Applied Chemistry Online Test 9th Science Lesson 16 Questions in English
Applied Chemistry Online Test 9th Science Lesson 16 Questions in English
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Applied Chemistry Online Test 9th Science Lesson 16 Questions in English
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                        Question 1 of 1401. Question1. Assertion (A): Applied chemistry is used to resolve the real-world problems. 
 Reasoning(R): Chemical principles and theories are applied in various fields.Correct
 Explanation 
 Chemical principles and theories are applied to various fields in order to achieve specific results
 or to solve real-world problems. This is called applied chemistry.Incorrect
 Explanation 
 Chemical principles and theories are applied to various fields in order to achieve specific results
 or to solve real-world problems. This is called applied chemistry.
- 
                        Question 2 of 1402. Question- Which of these does not influence the characteristics of a material?
 Correct
 Explanation The size and shape of materials influence their characteristics. Scientists found that materials having size about 1/1,000,000,000 metres show special characteristics. Incorrect
 Explanation The size and shape of materials influence their characteristics. Scientists found that materials having size about 1/1,000,000,000 metres show special characteristics. 
- 
                        Question 3 of 1403. Question- Which of these studies are made by the Nano chemistry branch?
 Correct
 Explanation The Scientist started producing kind of special materials and studied the effect of size on properties. Thus a new branch of chemistry called ‘Nano chemistry’ was developed. Incorrect
 Explanation The Scientist started producing kind of special materials and studied the effect of size on properties. Thus a new branch of chemistry called ‘Nano chemistry’ was developed. 
- 
                        Question 4 of 1404. Question- Choose the Incorrect statements.
- i) The chemical applications of Nano technology is dealt with the Nano chemistry.
- ii) Nano chemistry involves synthesis and manipulation of materials at atomic and molecular level.
 iii) The study of chemical properties alone is done by Nano chemistry. Correct
 Explanation Nano chemistry is a branch of Nano science that deals with the chemical applications of nanomaterial’s in nanotechnology. It involves synthesis and manipulation of materials at atomic and molecular level and the study of their physical and chemical properties. Incorrect
 Explanation Nano chemistry is a branch of Nano science that deals with the chemical applications of nanomaterial’s in nanotechnology. It involves synthesis and manipulation of materials at atomic and molecular level and the study of their physical and chemical properties. 
- 
                        Question 5 of 1405. Question- From which of this language Nano is derived?
 Correct
 Explanation The word Nano has been derived from the Greek word ‘Nanos’ which is designated to represent billionth fraction of a unit. Incorrect
 Explanation The word Nano has been derived from the Greek word ‘Nanos’ which is designated to represent billionth fraction of a unit. 
- 
                        Question 6 of 1406. Question- Which of this value is equal to one nanometer?
 Correct
 Explanation One nanometer (nm) is 10−9 or 0.000,000,001 meter. Incorrect
 Explanation One nanometer (nm) is 10−9 or 0.000,000,001 meter. 
- 
                        Question 7 of 1407. Question- What is the approximate value of human DNA?
 Correct
 Explanation The DNA double helix is 2 nm across. Incorrect
 Explanation The DNA double helix is 2 nm across. 
- 
                        Question 8 of 1408. Question- What is the diameter of an hydrogen atom?
 Correct
 Explanation The diameter of one hydrogen atom is around 0.2 nm. Incorrect
 Explanation The diameter of one hydrogen atom is around 0.2 nm. 
- 
                        Question 9 of 1409. Question- What are the properties of nano materials?
 Correct
 Explanation The properties of materials with nano meter dimensions are significantly different from those of atoms and bulk materials. This is mainly because the nano meter size of the materials render them, larger surface area, high surface energy, spatial confinement and reduced imperfections which do not exist in the corresponding bulk materials. Incorrect
 Explanation The properties of materials with nano meter dimensions are significantly different from those of atoms and bulk materials. This is mainly because the nano meter size of the materials render them, larger surface area, high surface energy, spatial confinement and reduced imperfections which do not exist in the corresponding bulk materials. 
- 
                        Question 10 of 14010. Question- Which of these characteristics are considered mainly for a nano material?
 Correct
 Explanation The surface characteristics of nanoparticles are the main criteria to be considered for applications. Incorrect
 Explanation The surface characteristics of nanoparticles are the main criteria to be considered for applications. 
- 
                        Question 11 of 14011. Question- Which of these instruments are not used to analyze the surface properties of nano material?
 Correct
 Explanation Highly sophisticated instruments like Scanning Electron Microscope (SEM), Tunneling Electron Microscope (TEM) and Atomic Force Microscope (AFM) are used to analyze the surface properties of a nanoparticle with high resolution. Incorrect
 Explanation Highly sophisticated instruments like Scanning Electron Microscope (SEM), Tunneling Electron Microscope (TEM) and Atomic Force Microscope (AFM) are used to analyze the surface properties of a nanoparticle with high resolution. 
- 
                        Question 12 of 14012. Question- What is the usage of metallic nano particles in the sophisticated instruments?
 Correct
 Explanation The metallic nanoparticles can be used as very active catalysts to analyze the surface properties of a nanoparticle with high resolution. Incorrect
 Explanation The metallic nanoparticles can be used as very active catalysts to analyze the surface properties of a nanoparticle with high resolution. 
- 
                        Question 13 of 14013. Question- What are the applications of nano coatings?
 Correct
 Explanation Nano coatings and nano composites are found useful in making variety of products such as sports equipment, bicycles and automobiles etc. Incorrect
 Explanation Nano coatings and nano composites are found useful in making variety of products such as sports equipment, bicycles and automobiles etc. 
- 
                        Question 14 of 14014. Question- In which of these Nano particles are not used?
 Correct
 Explanation Nanotechnology is applied in the production of synthetic skin and implant surgery. Nano materials that conduct electricity are being used in electronics as minute conductors to produce circuits for microchips. Nano materials have extensive applications in the preparation of cosmetics, deodorants and sun screen lotion. Incorrect
 Explanation Nanotechnology is applied in the production of synthetic skin and implant surgery. Nano materials that conduct electricity are being used in electronics as minute conductors to produce circuits for microchips. Nano materials have extensive applications in the preparation of cosmetics, deodorants and sun screen lotion. 
- 
                        Question 15 of 14015. Question- Which of this growth is prevented by nanoparticles in fabrics?
 Correct
 Explanation Nanoparticle substances are incorporated in fabrics to prevent the growth of bacteria. Incorrect
 Explanation Nanoparticle substances are incorporated in fabrics to prevent the growth of bacteria. 
- 
                        Question 16 of 14016. Question- Assertion (A): Nanoparticles are unstable with oxygen and can cause explosion.
 Reasoning(R): Nano particles are highly reactive with impurities. Correct
 Explanation Nanoparticles are unstable when they react with oxygen. Their exothermic combustion with oxygen can easily cause explosion. Because nanoparticles are highly reactive, they inherently interact with impurities as well. Incorrect
 Explanation Nanoparticles are unstable when they react with oxygen. Their exothermic combustion with oxygen can easily cause explosion. Because nanoparticles are highly reactive, they inherently interact with impurities as well. 
- 
                        Question 17 of 14017. Question- Choose the correct statements.
- i) Nano materials are biologically safe and non-toxic.
- ii) Nano materials are easy to synthesis and isolate.
 iii) Nano materials do not have any hard and fast safe disposal policies. Correct
 Explanation Nano materials are biologically harmful and toxic. It is difficult to synthesis, isolate and apply them. There are no hard-and-fast safe disposal policies for nano materials. Incorrect
 Explanation Nano materials are biologically harmful and toxic. It is difficult to synthesis, isolate and apply them. There are no hard-and-fast safe disposal policies for nano materials. 
- 
                        Question 18 of 14018. Question- Assertion (A): Pharmaceutical chemistry is the study of drugs.
 Reasoning (R): The general laws of chemistry are followed to study drugs. Correct
 Explanation Pharmaceutical chemistry is the chemistry of drugs which utilizes the general laws of chemistry to study drugs. Incorrect
 Explanation Pharmaceutical chemistry is the chemistry of drugs which utilizes the general laws of chemistry to study drugs. 
- 
                        Question 19 of 14019. Question- Which of these are not related to Pharmaceutical chemistry?
 Correct
 Explanation Pharmaceutical chemistry deals with preparation of drugs and the study of chemical composition, nature, behavior, structure and influence of the drug in an organism, condition of their storage and the therapeutic uses of the drugs. Incorrect
 Explanation Pharmaceutical chemistry deals with preparation of drugs and the study of chemical composition, nature, behavior, structure and influence of the drug in an organism, condition of their storage and the therapeutic uses of the drugs. 
- 
                        Question 20 of 14020. Question- What is the core of pharmaceutical chemistry?
 Correct
 Explanation Drug discovery is the core of pharmaceutical chemistry. Incorrect
 Explanation Drug discovery is the core of pharmaceutical chemistry. 
- 
                        Question 21 of 14021. Question- What is the origin of the word Drug?
 Correct
 Explanation The chemicals used for treating diseases are termed as drug. The word drug is derived from the French word ‘droque’ which means a dry herb. Incorrect
 Explanation The chemicals used for treating diseases are termed as drug. The word drug is derived from the French word ‘droque’ which means a dry herb. 
- 
                        Question 22 of 14022. Question- Which of these organ defined drug is used to modify or explore physiological systems?
 Correct
 Explanation According to World Health Organization a drug is defined as follows: ‘It is a substance or product that is used or intended to be used to modify or explore physiological systems or pathological states for the benefits of the recipient’. Incorrect
 Explanation According to World Health Organization a drug is defined as follows: ‘It is a substance or product that is used or intended to be used to modify or explore physiological systems or pathological states for the benefits of the recipient’. 
- 
                        Question 23 of 14023. Question- Which is not a characteristic of drugs?
 Correct
 Explanation A drug must possess the following characteristics: It should not be toxic. It should not cause any side effects. It should not affect the receptor tissues. It should not affect the normal physiological activities. It should be effective in its action. Incorrect
 Explanation A drug must possess the following characteristics: It should not be toxic. It should not cause any side effects. It should not affect the receptor tissues. It should not affect the normal physiological activities. It should be effective in its action. 
- 
                        Question 24 of 14024. Question- Assertion (A): Animals and plants are the main sources of drugs.
 Reasoning(R): Synthesized drugs are adopted by modern manufacturers for specialized treatments. Correct
 Explanation The main sources of drugs are animals and plants. The modern manufacturers adopt many chemical strategies to synthesize drugs for specialized treatments which are more uniform than natural materials. Incorrect
 Explanation The main sources of drugs are animals and plants. The modern manufacturers adopt many chemical strategies to synthesize drugs for specialized treatments which are more uniform than natural materials. 
- 
                        Question 25 of 14025. QuestionIdentify the Incorrect match. Microorganism i) Aspirin Minerals ii) Liquid Paraffin Plants iii) Morphine Genetic Engineering iv) Human growth Hormone Correct
 Explanation  Incorrect Incorrect
 Explanation  
- 
                        Question 26 of 14026. Question- How many categories of drugs are characterized?
 Correct
 Explanation Drugs fall into two general categories: - The drugs that are used in the treatment and cure of any specific disease.
- The drugs that have some characteristic effect on the animal organism but do not have any remedial effect for a particular disease. This class includes, morphine, cocaine etc.
 Incorrect
 Explanation Drugs fall into two general categories: - The drugs that are used in the treatment and cure of any specific disease.
- The drugs that have some characteristic effect on the animal organism but do not have any remedial effect for a particular disease. This class includes, morphine, cocaine etc.
 
- 
                        Question 27 of 14027. Question- Which does not have a characteristic effect on animal organism?
 Correct
 Explanation The drugs that have some characteristic effect on the animal organism do not have any remedial effect for a particular disease. This class includes, morphine, cocaine etc. Incorrect
 Explanation The drugs that have some characteristic effect on the animal organism do not have any remedial effect for a particular disease. This class includes, morphine, cocaine etc. 
- 
                        Question 28 of 14028. Question- Which of this drug causes loss of sensation?
 Correct
 Explanation The drugs which cause loss of sensation are called Anesthetics. They are given to patients when they undergo surgery. Incorrect
 Explanation The drugs which cause loss of sensation are called Anesthetics. They are given to patients when they undergo surgery. 
- 
                        Question 29 of 14029. Question- Assertion (A): General anesthetics agents bring loss of all modalities of sensation.
 Reasoning(R): It causes loss of pain with reversible loss of consciousness. Correct
 Explanation General anesthetics: They are the agents, which bring about loss of all modalities of sensation, particularly pain along with ‘reversible’ loss of consciousness. Incorrect
 Explanation General anesthetics: They are the agents, which bring about loss of all modalities of sensation, particularly pain along with ‘reversible’ loss of consciousness. 
- 
                        Question 30 of 14030. Question- Choose the correct statements regarding the local anesthetics.
 i) It is used in major surgeries to relieve pain. ii) Used to prevent pain in localized areas without affecting the degree of consciousness. Correct
 Explanation Local anesthetics: They prevent the pain sensation in localized areas without affecting the degree of consciousness. For example, dentist give patients this kind of anesthetics when carry out a minor surgery in teeth. Incorrect
 Explanation Local anesthetics: They prevent the pain sensation in localized areas without affecting the degree of consciousness. For example, dentist give patients this kind of anesthetics when carry out a minor surgery in teeth. 
- 
                        Question 31 of 14031. Question- How many major anesthetics chemicals are used?
 Correct
 Explanation Chemicals as Anesthetics: There are three major chemicals which are used as anesthetics. Incorrect
 Explanation Chemicals as Anesthetics: There are three major chemicals which are used as anesthetics. 
- 
                        Question 32 of 14032. Question- Choose the Incorrect statements regarding Nitrous oxide.
 i) It is a red color organic gas. ii) It is mixed with general anesthetics like ether. iii) It is the safest anesthetic agent. Correct
 Explanation Nitrous Oxide (N2O): It is a colorless, nonirritating, inorganic gas. It is the safest of the anesthetic agents. This is used after mixing general anesthetics like ether. Incorrect
 Explanation Nitrous Oxide (N2O): It is a colorless, nonirritating, inorganic gas. It is the safest of the anesthetic agents. This is used after mixing general anesthetics like ether. 
- 
                        Question 33 of 14033. Question- Which of these forms a toxic in reaction with oxygen?
 Correct
 Explanation Chloroform (CHCl3): It is a volatile liquid. It has pleasant smell and sweet taste. With oxygen it forms a toxic carbonyl chloride. Hence it is not used now. Incorrect
 Explanation Chloroform (CHCl3): It is a volatile liquid. It has pleasant smell and sweet taste. With oxygen it forms a toxic carbonyl chloride. Hence it is not used now. 
- 
                        Question 34 of 14034. Question- Which is not ether?
 Correct
 Explanation Ether: Diethyl ether or simple ether (C2H5-O-C2H5) is a volatile liquid. Incorrect
 Explanation Ether: Diethyl ether or simple ether (C2H5-O-C2H5) is a volatile liquid. 
- 
                        Question 35 of 14035. Question- Which is used as a stabilizer with ether?
 Correct
 Explanation Ether is mixed with a stabilizer 0.002% propyl halide. After absorption by tissues it attacks the central nervous system and makes the patient unconscious. Incorrect
 Explanation Ether is mixed with a stabilizer 0.002% propyl halide. After absorption by tissues it attacks the central nervous system and makes the patient unconscious. 
- 
                        Question 36 of 14036. Question- What is the effect of analgesics?
 Correct
 Explanation Analgesics are the compounds which relieve all sorts of pains without the loss of consciousness. These are also called as pain killer or pain relievers. Incorrect
 Explanation Analgesics are the compounds which relieve all sorts of pains without the loss of consciousness. These are also called as pain killer or pain relievers. 
- 
                        Question 37 of 14037. Question- Which of these are healed by analgesics?
 Correct
 Explanation Analgesics are effective in healing headaches, myalgia and arthralgia. Incorrect
 Explanation Analgesics are effective in healing headaches, myalgia and arthralgia. 
- 
                        Question 38 of 14038. Question- Which is not used as analgesics?
 Correct
 Explanation Aspirin and Novalgin are the commonly used analgesics. Aspirin acts both as antipyretic as well as analgesic. Certain narcotics (which produce sleep and unconsciousness) are also used as analgesics. Incorrect
 Explanation Aspirin and Novalgin are the commonly used analgesics. Aspirin acts both as antipyretic as well as analgesic. Certain narcotics (which produce sleep and unconsciousness) are also used as analgesics. 
- 
                        Question 39 of 14039. Question- Assertion (A): The Analgesics are given orally or applied externally.
 Reasoning(R): Externally applicable pain killers are available in gel form. Correct
 Explanation The analgesics are given either orally or applied externally. In general externally applicable pain killers come as ‘gels’. Incorrect
 Explanation The analgesics are given either orally or applied externally. In general externally applicable pain killers come as ‘gels’. 
- 
                        Question 40 of 14040. Question- What is the usage of antipyretics compounds?
 Correct
 Explanation Antipyretics are the compounds which are used for the purpose of reducing fever (lowering the body temperature to the normal). They are taken orally as tablets and capsules. Incorrect
 Explanation Antipyretics are the compounds which are used for the purpose of reducing fever (lowering the body temperature to the normal). They are taken orally as tablets and capsules. 
- 
                        Question 41 of 14041. Question- Which of these are not used as antipyretics?
 Correct
 Explanation The most common antipyretics are aspirin, antipyrine, phenacetin and paracetamol. Incorrect
 Explanation The most common antipyretics are aspirin, antipyrine, phenacetin and paracetamol. 
- 
                        Question 42 of 14042. Question- For which of these infections antiseptic are used?
 Correct
 Explanation Antiseptic is a substance that prevents infections caused by disease causing microorganisms or pathogens. Incorrect
 Explanation Antiseptic is a substance that prevents infections caused by disease causing microorganisms or pathogens. 
- 
                        Question 43 of 14043. Question- Choose the correct statements regarding the antiseptics.
 i) They are used to kill micro-organism and prevent their growth. ii) It is only used for cleansing externally wounds. Correct
 Explanation Antiseptics either kill the micro-organism or prevent their growth. Antiseptics are used externally to cleanse wounds and internally to treat infections of the intestine and bladder. Incorrect
 Explanation Antiseptics either kill the micro-organism or prevent their growth. Antiseptics are used externally to cleanse wounds and internally to treat infections of the intestine and bladder. 
- 
                        Question 44 of 14044. Question- Which of these statements are not correct?
 Correct
 Explanation Iodoform (CHI3) is used as an antiseptic and its 1% solution is a disinfectant. 0.2 % solution of phenol acts as an antiseptic and its 1% solution is a disinfectant. Hydrogen peroxide is a minor antiseptic mainly used for cleansing wounds. Incorrect
 Explanation Iodoform (CHI3) is used as an antiseptic and its 1% solution is a disinfectant. 0.2 % solution of phenol acts as an antiseptic and its 1% solution is a disinfectant. Hydrogen peroxide is a minor antiseptic mainly used for cleansing wounds. 
- 
                        Question 45 of 14045. Question- What are the effects of malaria disease?
 Correct
 Explanation Malaria is a vector borne disease which causes shivering and fever. It raises the body temperature to 103-106 °F. It causes physical weakness with the side-effects in liver and also causes anemia. Incorrect
 Explanation Malaria is a vector borne disease which causes shivering and fever. It raises the body temperature to 103-106 °F. It causes physical weakness with the side-effects in liver and also causes anemia. 
- 
                        Question 46 of 14046. Question- From which of these Quinine is obtained?
 Correct
 Explanation Extracts of roots and stems of certain plants are extensively used as antimalarial. Quinine is a natural antimalarial obtained from Cinchona bark. Incorrect
 Explanation Extracts of roots and stems of certain plants are extensively used as antimalarial. Quinine is a natural antimalarial obtained from Cinchona bark. 
- 
                        Question 47 of 14047. Question- Which of this is not an antimalarial?
 Correct
 Explanation The last antimalarial discovered in 1961 is pyrimethamine. However, quinine, primaquine and chloroquine are some of the best antimalarial. Incorrect
 Explanation The last antimalarial discovered in 1961 is pyrimethamine. However, quinine, primaquine and chloroquine are some of the best antimalarial. 
- 
                        Question 48 of 14048. Question- Which is used to control the malarial parasites?
 Correct
 Explanation Chloroquine is used specially to control malarial parasites such as plasmodium ovale, plasmodium vivax etc. It is not used in curing the disease. It is used as an additive with other antimalarial drugs. Incorrect
 Explanation Chloroquine is used specially to control malarial parasites such as plasmodium ovale, plasmodium vivax etc. It is not used in curing the disease. It is used as an additive with other antimalarial drugs. 
- 
                        Question 49 of 14049. Question- Which of this chemical compound is not an antibiotic?
 Correct
 Explanation Many microorganisms (bacteria, fungi and molds) produce certain chemicals which inhibit the growth or metabolism of some other disease causing micro-organisms. Such chemical compounds are known as antibiotics. Incorrect
 Explanation Many microorganisms (bacteria, fungi and molds) produce certain chemicals which inhibit the growth or metabolism of some other disease causing micro-organisms. Such chemical compounds are known as antibiotics. 
- 
                        Question 50 of 14050. Question- Assertion (A): The effective antibiotics are present only in low concentration.
 Reasoning(R): Antibiotics involves in the growth or metabolism of disease causing micro-organisms. Correct
 Explanation Antibiotics are chemicals inhibit the growth or metabolism of some other disease causing micro-organisms these need to be present only in low concentration to be effective in their antibiotic action. Incorrect
 Explanation Antibiotics are chemicals inhibit the growth or metabolism of some other disease causing micro-organisms these need to be present only in low concentration to be effective in their antibiotic action. 
- 
                        Question 51 of 14051. Question- From which of this mold the first antibiotic was discovered?
 Correct
 Explanation The first antibiotic ‘penicillin’ was discovered by Alexander Fleming in 1929 from the mold Penicillium notatum. Incorrect
 Explanation The first antibiotic ‘penicillin’ was discovered by Alexander Fleming in 1929 from the mold Penicillium notatum. 
- 
                        Question 52 of 14052. Question- Which of these diseases are cured by penicillin?
 Correct
 Explanation Penicillin is extensively used for rheumatic fever, narrowing of heart wall, bronchitis, and pneumonia etc. Incorrect
 Explanation Penicillin is extensively used for rheumatic fever, narrowing of heart wall, bronchitis, and pneumonia etc. 
- 
                        Question 53 of 14053. Question- Which is not a source of antibiotics?
 Correct
 Explanation There are three main sources of antibiotics: (i) Bacteria (ii) Fungi and (iii) Actinomycetes Incorrect
 Explanation There are three main sources of antibiotics: (i) Bacteria (ii) Fungi and (iii) Actinomycetes 
- 
                        Question 54 of 14054. Question- Which of these are natural antibiotics?
 Correct
 Explanation The original antibiotics like a lot of today’s antibiotics are derived from natural sources. Certain plant extracts, essential oils, and even foods have antibiotic properties. Example: Honey, garlic, ginger, clove, neem and turmeric. Incorrect
 Explanation The original antibiotics like a lot of today’s antibiotics are derived from natural sources. Certain plant extracts, essential oils, and even foods have antibiotic properties. Example: Honey, garlic, ginger, clove, neem and turmeric. 
- 
                        Question 55 of 14055. Question- Which of these drugs is used to balance the acidity in Human body?
 Correct
 Explanation Quite often after eating oily and spicy food one may feel uncomfortable due to some burning sensation in stomach / food pipe. This is due to imbalance in the acidity in the stomach. Certain drug formulations provide relief from such burning sensation. These are known as antacids. Incorrect
 Explanation Quite often after eating oily and spicy food one may feel uncomfortable due to some burning sensation in stomach / food pipe. This is due to imbalance in the acidity in the stomach. Certain drug formulations provide relief from such burning sensation. These are known as antacids. 
- 
                        Question 56 of 14056. Question- Choose the correct statements.
 i) Antacids are available only in tablet form. ii) Magnesium and Aluminium hydroxides are added for color and flavoring agents of antacids. Correct
 Explanation Antacids are available in tablet as well as gel / syrup forms. These antacids contain magnesium and Aluminium hydroxides in addition to flavoring agents and color. Incorrect
 Explanation Antacids are available in tablet as well as gel / syrup forms. These antacids contain magnesium and Aluminium hydroxides in addition to flavoring agents and color. 
- 
                        Question 57 of 14057. Question- Assertion (A): Electrochemistry is the branch of applied chemistry.
 Reasoning(R): The chemical energy can be converted into electrical energy and vice versa. Correct
 Explanation The chemical reactions (chemical energy) that take place in the battery produce electricity (electrical energy). So when scientists realized that chemical energy can be converted into electrical energy and vice versa another branch of applied chemistry was developed. It is Electrochemistry. Incorrect
 Explanation The chemical reactions (chemical energy) that take place in the battery produce electricity (electrical energy). So when scientists realized that chemical energy can be converted into electrical energy and vice versa another branch of applied chemistry was developed. It is Electrochemistry. 
- 
                        Question 58 of 14058. Question- Which of these processes is mainly considered in Electrochemistry?
 Correct
 Explanation Electrochemistry is a branch of chemistry which deals with the relation between electrical energy and chemical change. It is mainly concerned with the processes taking place between the electrode and solution having ions called electrolyte. Incorrect
 Explanation Electrochemistry is a branch of chemistry which deals with the relation between electrical energy and chemical change. It is mainly concerned with the processes taking place between the electrode and solution having ions called electrolyte. 
- 
                        Question 59 of 14059. Question- Which of this reaction produce electricity in Electrochemistry?
 Correct
 Explanation Only redox reactions that take place in a specific device can produce electricity. Incorrect
 Explanation Only redox reactions that take place in a specific device can produce electricity. 
- 
                        Question 60 of 14060. Question- Which of this device produce electricity by using chemical changes?
 Correct
 Explanation The device that makes use of a chemical change to produce electricity or electricity to produce chemical change is called Electrochemical Cell. Incorrect
 Explanation The device that makes use of a chemical change to produce electricity or electricity to produce chemical change is called Electrochemical Cell. 
- 
                        Question 61 of 14061. Question- How many components are comprised in an electrochemical cell?
 Correct
 Explanation An electrochemical cell may comprise of two major components. Incorrect
 Explanation An electrochemical cell may comprise of two major components. 
- 
                        Question 62 of 14062. Question- Choose the Incorrect statements.
 i) Electrodes are solid electrical conductor made of metal and some non-metals. ii) A cell consists of more than two electrodes. iii) Anode and Cathode are used in cells. Correct
 Explanation Electrode: It is a solid electrical conductor made of metal (sometimes non-metal like graphite). A cell consists of two electrodes. One is called Anode and the other is called Cathode. Incorrect
 Explanation Electrode: It is a solid electrical conductor made of metal (sometimes non-metal like graphite). A cell consists of two electrodes. One is called Anode and the other is called Cathode. 
- 
                        Question 63 of 14063. Question- Which of these have molten salts or ion solutions?
 Correct
 Explanation Electrolyte: It is made up of solutions of ions or molten salts which can conduct electricity. Incorrect
 Explanation Electrolyte: It is made up of solutions of ions or molten salts which can conduct electricity. 
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                        Question 64 of 14064. Question- How many reactions are involved in an electrochemical cell?
 Correct
 Explanation An electrochemical cell involves two reactions simultaneously. Incorrect
 Explanation An electrochemical cell involves two reactions simultaneously. 
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                        Question 65 of 14065. Question- Oxidation is _______ of electron takes place at _______.
 Correct
 Explanation Oxidation: As we know already an oxidation is loss of electron. In electrochemical cells oxidation takes place at anode. Metal → Metal ion + electron (e-) Incorrect
 Explanation Oxidation: As we know already an oxidation is loss of electron. In electrochemical cells oxidation takes place at anode. Metal → Metal ion + electron (e-) 
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                        Question 66 of 14066. Question- Where the reduction takes place in a electrochemical cell?
 Correct
 Explanation Reduction: It involves gain of electron. Reduction takes place at cathode. Metal ion + electron (e-) → Metal Incorrect
 Explanation Reduction: It involves gain of electron. Reduction takes place at cathode. Metal ion + electron (e-) → Metal 
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                        Question 67 of 14067. Question- Which of this reaction is involved in the inter conversion of electrical and chemical energy?
 Correct
 Explanation Both the reactions take place simultaneously, the inter conversion of electrical and chemical energy in electrochemical cells involves a redox reaction. Incorrect
 Explanation Both the reactions take place simultaneously, the inter conversion of electrical and chemical energy in electrochemical cells involves a redox reaction. 
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                        Question 68 of 14068. Question- On what basis the electrochemical cells are classified?
 Correct
 Explanation Based on the nature of the energy conversion, electrochemical cells are broadly classified. Incorrect
 Explanation Based on the nature of the energy conversion, electrochemical cells are broadly classified. 
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                        Question 69 of 14069. Question- Choose the Incorrect statements about the Galvanic cell.
 i) It is a type of electrochemical cell converts chemical energy into electrical energy. ii) It consists of three cells. Correct
 Explanation Galvanic Cell: It is an electrochemical cell which converts chemical energy into electrical energy i.e. it produces electricity from chemical reactions. It consists of two half cells namely anodic half-cell and cathodic half-cell. Incorrect
 Explanation Galvanic Cell: It is an electrochemical cell which converts chemical energy into electrical energy i.e. it produces electricity from chemical reactions. It consists of two half cells namely anodic half-cell and cathodic half-cell. 
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                        Question 70 of 14070. Question- Choose the correct statements.
 i) Anode is in contact with its electrolyte in anodic half-cell. ii) Anode and cathode are connected by conducting wire. Correct
 Explanation In anodic half-cell of galvanic cell the anode is in contact with its electrolyte whereas in cathodic half-cell, the cathode is in contact with its electrolyte. The anode and cathode are connected by a conductor wire. Incorrect
 Explanation In anodic half-cell of galvanic cell the anode is in contact with its electrolyte whereas in cathodic half-cell, the cathode is in contact with its electrolyte. The anode and cathode are connected by a conductor wire. 
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                        Question 71 of 14071. Question- What connects the electrolytes of half-cells in a galvanic cell?
 Correct
 Explanation The electrolytes of half-cells are connected through a tube containing a saturated salt solution. It is called salt bridge. Thus in galvanic cell, both the half-cells are kept separately but stay connected electrically. Incorrect
 Explanation The electrolytes of half-cells are connected through a tube containing a saturated salt solution. It is called salt bridge. Thus in galvanic cell, both the half-cells are kept separately but stay connected electrically. 
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                        Question 72 of 14072. Question- Which of this process produces electricity in the galvanic cell?
 Correct
 Explanation At anode, oxidation takes place which releases electrons. These electrons are attracted by cathode and hence the electrons flowing from anode to cathode are gained in reduction reaction. As long as the redox reaction proceeds, there is a flow of electrons and hence electricity. Incorrect
 Explanation At anode, oxidation takes place which releases electrons. These electrons are attracted by cathode and hence the electrons flowing from anode to cathode are gained in reduction reaction. As long as the redox reaction proceeds, there is a flow of electrons and hence electricity. 
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                        Question 73 of 14073. Question- Which is not a feature of the electrolytic cell?
 Correct
 Explanation Electrolytic Cell: It is an electrochemical cell which converts electrical energy into chemical energy i.e. in electrolytic cells; electricity is used to bring about chemical reactions. Here, both anode and cathode are in contact with same electrolyte and thus the half-cells are not separated. As seen in galvanic cells, electrolytic cell also involves redox reaction. Incorrect
 Explanation Electrolytic Cell: It is an electrochemical cell which converts electrical energy into chemical energy i.e. in electrolytic cells; electricity is used to bring about chemical reactions. Here, both anode and cathode are in contact with same electrolyte and thus the half-cells are not separated. As seen in galvanic cells, electrolytic cell also involves redox reaction. 
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                        Question 74 of 14074. Question- Which is not a usage of electrochemistry?
 Correct
 Explanation Electrochemistry: It has been used to discover important technical processes for the production and purification of non-ferrous metals, and for the electro- synthesis of organic compounds. Electrochemistry is used to predict whether a particular reaction will occur or not. Incorrect
 Explanation Electrochemistry: It has been used to discover important technical processes for the production and purification of non-ferrous metals, and for the electro- synthesis of organic compounds. Electrochemistry is used to predict whether a particular reaction will occur or not. 
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                        Question 75 of 14075. Question- Which of this redox reaction is identified in the alcohol detection?
 Correct
 Explanation The detection of alcohol in drunken drivers is possible through the electrochemical redox reaction of ethanol. Incorrect
 Explanation The detection of alcohol in drunken drivers is possible through the electrochemical redox reaction of ethanol. 
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                        Question 76 of 14076. Question- Which of these metals are produced from the electrochemical reaction of their ores?
 Correct
 Explanation Production of metals like aluminum and titanium from their ores involve electrochemical reactions. Incorrect
 Explanation Production of metals like aluminum and titanium from their ores involve electrochemical reactions. 
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                        Question 77 of 14077. Question- Which of these directly convert chemical energy into electrical energy?
 Correct
 Explanation Lead acid batteries, lithium-ion batteries and fuel cells are based on electrochemical cells. Fuel cell is used to bring about direct conversion of chemical energy into electrical energy. Incorrect
 Explanation Lead acid batteries, lithium-ion batteries and fuel cells are based on electrochemical cells. Fuel cell is used to bring about direct conversion of chemical energy into electrical energy. 
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                        Question 78 of 14078. Question- Assertion (A): Isotopes are atoms with same number of protons and electrons and different number of neutrons.
 Reasoning(R): All the isotopes found in nature are stable and stay forever. Correct
 Explanation Isotopes are atoms with same number of protons and electrons and a different number of neutrons. Some isotopes are stable and stay forever. These are the elements that we see around us and find in nature. Incorrect
 Explanation Isotopes are atoms with same number of protons and electrons and a different number of neutrons. Some isotopes are stable and stay forever. These are the elements that we see around us and find in nature. 
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                        Question 79 of 14079. Question- In which form the isotopes lose their energy?
 Correct
 Explanation Some isotopes are unstable and they undergo disintegration by losing their energy in the form of radiation. Incorrect
 Explanation Some isotopes are unstable and they undergo disintegration by losing their energy in the form of radiation. 
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                        Question 80 of 14080. Question- Choose the correct statements.
 i) Every element tries to attain stability by sharing, losing or gaining electrons. ii) The Unstable isotopes lose their energy in the form of radiation. Correct
 Explanation Every element tries to attain stability by sharing, losing or gaining electrons (octet rule). Thus the unstable isotopes of elements lose their energy in the form of radiation to become stable. Incorrect
 Explanation Every element tries to attain stability by sharing, losing or gaining electrons (octet rule). Thus the unstable isotopes of elements lose their energy in the form of radiation to become stable. 
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                        Question 81 of 14081. Question- Assertion (A): The radioactive decay of isotopes is called as Radioactivity.
 Reasoning (R): Radioactive isotope is also called as radioisotope. Correct
 Explanation The Isotope which undergoes radioactive decay is called radioactive isotope or radioisotope. This property of isotopes is known as radioactivity. Incorrect
 Explanation The Isotope which undergoes radioactive decay is called radioactive isotope or radioisotope. This property of isotopes is known as radioactivity. 
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                        Question 82 of 14082. Question- Which of this gas is acquired by decaying uranium?
 Correct
 Explanation Uranium in the ground can decay into radon gas which can be very dangerous to humans. It is thought to be the second leading isotope to cause lung cancer. Incorrect
 Explanation Uranium in the ground can decay into radon gas which can be very dangerous to humans. It is thought to be the second leading isotope to cause lung cancer. 
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                        Question 83 of 14083. Question- Assertion (A): Radiochemistry is the study of radioactive and non-radioactive isotopes.
 Reasoning(R): Artificial isotopes are only included in radiochemistry. Correct
 Explanation Radiochemistry is the study of chemistry of radioactive and non-radioactive isotopes. It includes both natural and artificial isotopes. Incorrect
 Explanation Radiochemistry is the study of chemistry of radioactive and non-radioactive isotopes. It includes both natural and artificial isotopes. 
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                        Question 84 of 14084. Question- What is the application of radiochemistry?
 Correct
 Explanation Radiochemistry mainly deals with application of radioisotopes to study the nature of chemical reactions of non-radioactive isotopes of elements and applications of radioisotopes to various fields. Incorrect
 Explanation Radiochemistry mainly deals with application of radioisotopes to study the nature of chemical reactions of non-radioactive isotopes of elements and applications of radioisotopes to various fields. 
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                        Question 85 of 14085. Question- Choose the correct statements.
 i) Radioisotopes are easily detected and estimated quantitatively. ii) Radiochemistry is applied in medical field and environmental management. Correct
 Explanation Radioisotopes can easily be detected and estimated quantitatively. So they are used in radiochemistry for various applications. Radiochemistry mainly deals with study of chemical reactions of non-radioactive isotopes using radioisotopes. In addition to that it could find applications in medical field and environmental management also. Incorrect
 Explanation Radioisotopes can easily be detected and estimated quantitatively. So they are used in radiochemistry for various applications. Radiochemistry mainly deals with study of chemical reactions of non-radioactive isotopes using radioisotopes. In addition to that it could find applications in medical field and environmental management also. 
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                        Question 86 of 14086. Question- Which of this isotope is used for radiocarbon dating?
 Correct
 Explanation Radiocarbon dating: It is a method by which the age of fossil wood or animal is determined using C-14 isotope. Incorrect
 Explanation Radiocarbon dating: It is a method by which the age of fossil wood or animal is determined using C-14 isotope. 
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                        Question 87 of 14087. Question- Identify the Incorrect match.
 Iron -59 i) Anemia diagnosis Hydrogen-3 ii) Water content of Human body Cobalt-60 iii) Brain tumor detection Sodium-24 iv) Heart pumping action Correct
 Explanation  Incorrect Incorrect
 Explanation  
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                        Question 88 of 14088. Question- Which of these uses radioactive isotopes for treating diseases?
 Correct
 Explanation Radiotherapy: Radioactive isotopes are used in the treatment of many diseases. This kind of treatment is called radiotherapy. Incorrect
 Explanation Radiotherapy: Radioactive isotopes are used in the treatment of many diseases. This kind of treatment is called radiotherapy. 
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                        Question 89 of 14089. Question- Match
 Skin disease i) Iodine-131 Cancer ii) Phosphorous-32 Hyperthyroidism iii) Gold-198 Correct
 Explanation  Incorrect Incorrect
 Explanation  
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                        Question 90 of 14090. Question- Which are added to the food stuffs to give them color?
 Correct
 Explanation We eat colored food stuffs and use numerous colored materials in our daily life. Because they contain some kind of chemicals in them which are called colorants. Incorrect
 Explanation We eat colored food stuffs and use numerous colored materials in our daily life. Because they contain some kind of chemicals in them which are called colorants. 
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                        Question 91 of 14091. Question- For which purpose the colorants were used by civilized people in history?
 Correct
 Explanation The uses of colorants by mankind for painting and dyeing dates back to the dawn of civilization. Incorrect
 Explanation The uses of colorants by mankind for painting and dyeing dates back to the dawn of civilization. 
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                        Question 92 of 14092. Question- Which of these inorganic pigments are used as colorants?
 Correct
 Explanation Inorganic pigments such as soot, manganese oxide, and hematite were used as colorants. Incorrect
 Explanation Inorganic pigments such as soot, manganese oxide, and hematite were used as colorants. 
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                        Question 93 of 14093. Question- From which of these organic colorants were extracted?
 Correct
 Explanation Organic natural colorants have also a timeless history of application, especially for coloring textiles. The organic compounds that are used as colorants are called dyes. These dyes are all aromatic compounds, originating from plants and also from insects, fungi and lichens Incorrect
 Explanation Organic natural colorants have also a timeless history of application, especially for coloring textiles. The organic compounds that are used as colorants are called dyes. These dyes are all aromatic compounds, originating from plants and also from insects, fungi and lichens 
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                        Question 94 of 14094. Question- Which is not correct regarding the Dye chemistry?
 Correct
 Explanation After the evolution of modern organic chemistry, many kinds of synthetic dyes were prepared and used by mankind. Dye chemistry is the study of such kind of dyes. It provides us information on theory, structure, synthesis and applications of synthetic dyes. Incorrect
 Explanation After the evolution of modern organic chemistry, many kinds of synthetic dyes were prepared and used by mankind. Dye chemistry is the study of such kind of dyes. It provides us information on theory, structure, synthesis and applications of synthetic dyes. 
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                        Question 95 of 14095. Question- Assertion (A): Dyes are colored compounds firmly fixed in fabrics by chemical bonding.
 Reasoning (R): All colored compounds are dyes. Correct
 Explanation All colored compounds are not dyes. Dyes are those colored compounds which can be firmly fixed in fabrics by chemical or physical bonding. Incorrect
 Explanation All colored compounds are not dyes. Dyes are those colored compounds which can be firmly fixed in fabrics by chemical or physical bonding. 
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                        Question 96 of 14096. Question- Which is not a characteristic of a dye?
 Correct
 Explanation A dye should have the following characteristics: - It should have a suitable color.
- It should be able to fix itself or be capable of being fixed to the fabric.
- It should be fast to light.
- It should be resistant to the action of water, dilute acids and alkalis.
 Incorrect
 Explanation A dye should have the following characteristics: - It should have a suitable color.
- It should be able to fix itself or be capable of being fixed to the fabric.
- It should be fast to light.
- It should be resistant to the action of water, dilute acids and alkalis.
 
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                        Question 97 of 14097. Question- Assertion (A): All the dyes are synthetic and prepared from coal tar.
 Reasoning (R): Coal tar dyes may differ in their structure and applications. Correct
 Explanation Practically all the dyes are synthetic, and are prepared from aromatic compounds obtained from coal tar. Therefore, such dyes are sometimes called as coal tar dyes. But, they may differ in their basic structure and the way of application. Incorrect
 Explanation Practically all the dyes are synthetic, and are prepared from aromatic compounds obtained from coal tar. Therefore, such dyes are sometimes called as coal tar dyes. But, they may differ in their basic structure and the way of application. 
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                        Question 98 of 14098. Question- In how many ways dyes are classified?
 Correct
 Explanation Dyes are classified in two ways: one, based on the method of application and other based on their parent structure. Incorrect
 Explanation Dyes are classified in two ways: one, based on the method of application and other based on their parent structure. 
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                        Question 99 of 14099. Question- Choose the correct statements regarding Acid dyes.
 i) It is used for dyeing animal and synthetic fibers. ii) This can be used for wool and silk. iii) Picric acid is an example of acid dye. Correct
 Explanation Acid dyes: These are acidic in nature and used for dyeing animal fibers and synthetic fibers. These can be used for protein fibers such as wool and silk. E.g. Picric acid, Naphthol yellow-s Incorrect
 Explanation Acid dyes: These are acidic in nature and used for dyeing animal fibers and synthetic fibers. These can be used for protein fibers such as wool and silk. E.g. Picric acid, Naphthol yellow-s 
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                        Question 100 of 140100. Question- Which is not a basic group of dyes?
 Correct
 Explanation Basic dyes: These are basic dyes containing basic group (-NH2,- NHR, – NR2). They are used for dyeing animal fibers and plant fibers. Incorrect
 Explanation Basic dyes: These are basic dyes containing basic group (-NH2,- NHR, – NR2). They are used for dyeing animal fibers and plant fibers. 
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                        Question 101 of 140101. Question- Which is called as indirect dyes?
 Correct
 Explanation Mordant dyes or indirect dyes: These dyes have a poor affinity for cotton fabrics and hence do not dye directly. They require pretreatment of the fiber with a mordant. Incorrect
 Explanation Mordant dyes or indirect dyes: These dyes have a poor affinity for cotton fabrics and hence do not dye directly. They require pretreatment of the fiber with a mordant. 
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                        Question 102 of 140102. Question- What can be combined to mordant to form dyes?
 Correct
 Explanation Mordant (latin : mordere = to bite) is a substance which can be fixed to the fiber and then can be combined with the dye to form an insoluble complex called lake. Incorrect
 Explanation Mordant (latin : mordere = to bite) is a substance which can be fixed to the fiber and then can be combined with the dye to form an insoluble complex called lake. 
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                        Question 103 of 140103. Question- Which of these are used as mordants?
 Correct
 Explanation Aluminium, chromium, and iron salts are widely used as mordants. E.g. alizarin Incorrect
 Explanation Aluminium, chromium, and iron salts are widely used as mordants. E.g. alizarin 
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                        Question 104 of 140104. Question- To which of these direct dyes have high affinity?
 Correct
 Explanation Direct dyes: They have high affinity for cotton, rayon and other cellulose fiber. So, they are applied directly as they fix firmly on the fabric. E.g. Congo red Incorrect
 Explanation Direct dyes: They have high affinity for cotton, rayon and other cellulose fiber. So, they are applied directly as they fix firmly on the fabric. E.g. Congo red 
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                        Question 105 of 140105. Question- In which of this material vat dyes can be used?
 Correct
 Explanation Vat dyes: It can be used only on cotton and, not on silk and wool. This dyeing is a continuous process and is carried out in a large vessel called vat. So, it is called as vat dye. E.g. Indigo Incorrect
 Explanation Vat dyes: It can be used only on cotton and, not on silk and wool. This dyeing is a continuous process and is carried out in a large vessel called vat. So, it is called as vat dye. E.g. Indigo 
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                        Question 106 of 140106. Question- Which of this dye is not classified based on its structure?
 Correct
 Explanation Based on the structure, dyes are classified as: Azo dyes, Diphenyl methane dye, Triphenyl methane dye, Phthalein dye, Anthraquinone dye, Indigo dyes, Phthalo cyanine dye, Nitro and nitroso dyes. Incorrect
 Explanation Based on the structure, dyes are classified as: Azo dyes, Diphenyl methane dye, Triphenyl methane dye, Phthalein dye, Anthraquinone dye, Indigo dyes, Phthalo cyanine dye, Nitro and nitroso dyes. 
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                        Question 107 of 140107. Question- Choose the correct statements regarding Agricultural chemistry.
 i) It involves the application of chemical and biochemical principles in agriculture. ii) It includes agricultural production and processing of raw materials into food and beverages. iii) It provides scientific relation between plants, animals, bacteria and environment. Correct
 Explanation Agricultural chemistry involves the application of chemical and biochemical knowledge to agricultural production, processing of raw materials into foods and beverages, and environmental monitoring and remediation. It deals with scientific relation between plants, animals, bacteria and environment. Incorrect
 Explanation Agricultural chemistry involves the application of chemical and biochemical knowledge to agricultural production, processing of raw materials into foods and beverages, and environmental monitoring and remediation. It deals with scientific relation between plants, animals, bacteria and environment. 
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                        Question 108 of 140108. Question- Assertion (A): Modernized agricultural practices involve synthetic fertilizers, modified crops and equipment.
 Reasoning (R): It aims in producing sufficient nutritious food for the population. Correct
 Explanation Indian chemists and biochemists applied their knowledge and developed modernized agricultural practices which involve use of synthetic fertilizers, genetically modified crops, and equipment’s. It aims at producing sufficient nutritious food and feed the population in a sustainable way while being responsible stewards of our environment and ecosystem. Incorrect
 Explanation Indian chemists and biochemists applied their knowledge and developed modernized agricultural practices which involve use of synthetic fertilizers, genetically modified crops, and equipment’s. It aims at producing sufficient nutritious food and feed the population in a sustainable way while being responsible stewards of our environment and ecosystem. 
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                        Question 109 of 140109. Question- Which of this issue is not addressed by the agricultural chemistry?
 Correct
 Explanation Based on the issues and challenges in agricultural production, agricultural chemistry mainly focuses to achieve the following: - Increase in crop yield and livestock
- Improvement of food quality
- Reducing cost of food production
 Incorrect
 Explanation Based on the issues and challenges in agricultural production, agricultural chemistry mainly focuses to achieve the following: - Increase in crop yield and livestock
- Improvement of food quality
- Reducing cost of food production
 
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                        Question 110 of 140110. Question- What are the effects of chemical principles in agriculture?
 Correct
 Explanation Chemical principles and reactions are most widely used in agriculture in order to increase yield, to protect crops from diseases and to simplify the practice of agriculture. Incorrect
 Explanation Chemical principles and reactions are most widely used in agriculture in order to increase yield, to protect crops from diseases and to simplify the practice of agriculture. 
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                        Question 111 of 140111. Question- What is the main criterion for soil testing process?
 Correct
 Explanation Soil Testing: Crop lands may have different kinds of soil with varying pH. Soil pH is one of the main criteria to be considered for the selection of crop or remediation of soil. Incorrect
 Explanation Soil Testing: Crop lands may have different kinds of soil with varying pH. Soil pH is one of the main criteria to be considered for the selection of crop or remediation of soil. 
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                        Question 112 of 140112. Question- Which of these are determined by soil testing?
 Correct
 Explanation Soil testing involves determination of pH, porosity and texture. Incorrect
 Explanation Soil testing involves determination of pH, porosity and texture. 
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                        Question 113 of 140113. Question- Choose the correct statements regarding chemical fertilizers.
 i) Fertilizers are chemical compounds added to crop field for essential micro and macro nutrients. ii) Fertilizers are used single or mixture compound based on the nature of soil. iii) Ammonium nitrate, calcium phosphate, urea and NPK are some of the fertilizers. Correct
 Explanation Chemical Fertilizers: Fertilizers are chemical compounds added to crop field for supplying essential micro and macro nutrients required for crop growth. Ammonium nitrate, calcium phosphate, urea, NPK (Nitrogen, Phosphorous and Potassium), etc. are some of the fertilizers. Depending on the nature of soil, these fertilizers are used singly or as mixtures. Incorrect
 Explanation Chemical Fertilizers: Fertilizers are chemical compounds added to crop field for supplying essential micro and macro nutrients required for crop growth. Ammonium nitrate, calcium phosphate, urea, NPK (Nitrogen, Phosphorous and Potassium), etc. are some of the fertilizers. Depending on the nature of soil, these fertilizers are used singly or as mixtures. 
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                        Question 114 of 140114. Question- Which of these are not used as pesticides and insecticides?
 Correct
 Explanation Pesticides and Insecticides: Crops are prone to diseases caused by pests and insects. Chemically synthesized pesticides and insecticides are used to solve these issues. Chlorinated hydrocarbons, organophosphates and carbonates are used as pesticides and insecticides. Incorrect
 Explanation Pesticides and Insecticides: Crops are prone to diseases caused by pests and insects. Chemically synthesized pesticides and insecticides are used to solve these issues. Chlorinated hydrocarbons, organophosphates and carbonates are used as pesticides and insecticides. 
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                        Question 115 of 140115. Question- Assertion (A): Food is the basic need of human and animal.
 Reasoning (R): Food is also made of chemicals. Correct
 Explanation Food is one of the basic needs of human and animal. The foods we eat also are made of chemicals. Any human might require the three kinds of food. Incorrect
 Explanation Food is one of the basic needs of human and animal. The foods we eat also are made of chemicals. Any human might require the three kinds of food. 
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                        Question 116 of 140116. Question- Match
 Fat i) Protective foods Minerals ii) Physical growth Protein iii) Energy supply Correct
 Explanation Body building foods: These are required for physical growth of body. E.g. Proteins Energy giving foods: These are the foods that supply energy for the functioning of parts human body. E.g. Carbohydrates and Fats. Protective foods: These protect us from deficiency diseases. E.g. Vitamins and Minerals Incorrect
 Explanation Body building foods: These are required for physical growth of body. E.g. Proteins Energy giving foods: These are the foods that supply energy for the functioning of parts human body. E.g. Carbohydrates and Fats. Protective foods: These protect us from deficiency diseases. E.g. Vitamins and Minerals 
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                        Question 117 of 140117. Question- Assertion (A): Balanced diet contains three kinds of foods in right proportion.
 Reasoning(R): Human requires three kinds of food in right proportion for smooth functioning of body. Correct
 Explanation Every human requires all these three kind of foods in right proportion for the smooth functioning of the body. The diet that contains all these three foods in right proportion is called Balanced diet. Incorrect
 Explanation Every human requires all these three kind of foods in right proportion for the smooth functioning of the body. The diet that contains all these three foods in right proportion is called Balanced diet. 
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                        Question 118 of 140118. QuestionChoose the correct statements. i) Food chemistry involves the analysis processing and packaging of food. ii) Utilization of food materials including bioenergy for food safety and quality. Correct
 Explanation Food chemistry is the chemistry of foods which involves the analysis, processing, packaging, and utilization of materials including bioenergy for food safety and quality. Incorrect
 Explanation Food chemistry is the chemistry of foods which involves the analysis, processing, packaging, and utilization of materials including bioenergy for food safety and quality. 
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                        Question 119 of 140119. Question- What is the main goal of food chemistry?
 Correct
 Explanation Goals of food chemistry: The main goal of food chemistry is to cater the needs of quality food to the population in a sustainable way. Incorrect
 Explanation Goals of food chemistry: The main goal of food chemistry is to cater the needs of quality food to the population in a sustainable way. 
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                        Question 120 of 140120. Question- What are the foods properties studied and analyzed by the food chemists?
 Correct
 Explanation In basic research, food chemists study the properties of proteins, fats, starches, and carbohydrates, as well as micro components such as additives and flavorings to determine how each works in a food system. Incorrect
 Explanation In basic research, food chemists study the properties of proteins, fats, starches, and carbohydrates, as well as micro components such as additives and flavorings to determine how each works in a food system. 
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                        Question 121 of 140121. Question- Which of these are the new ingredients developed by research applications?
 Correct
 Explanation In application research, they often develop new ways to use ingredients or new ingredients altogether, such as fat or sugar replacements. Incorrect
 Explanation In application research, they often develop new ways to use ingredients or new ingredients altogether, such as fat or sugar replacements. 
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                        Question 122 of 140122. Question- Assertion (A): Human food contains only the natural chemicals.
 Reasoning (R): The chemicals in food are used for different functions in human body. Correct
 Explanation Chemicals in Food we eat in our day to day life contain natural or synthetic chemicals. They serve different functions in human body. Incorrect
 Explanation Chemicals in Food we eat in our day to day life contain natural or synthetic chemicals. They serve different functions in human body. 
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                        Question 123 of 140123. Question- Which is not true regarding the nutrients of food?
 Correct
 Explanation Nutrients: They are the most essential chemicals present in food. They are required for the growth, physiological and metabolic activities of body. Incorrect
 Explanation Nutrients: They are the most essential chemicals present in food. They are required for the growth, physiological and metabolic activities of body. 
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                        Question 124 of 140124. Question- Which of these are not included in nutrients?
 Correct
 Explanation The Nutrients are natural or synthetic. E.g. Carbohydrates, proteins, vitamins and minerals. Incorrect
 Explanation The Nutrients are natural or synthetic. E.g. Carbohydrates, proteins, vitamins and minerals. 
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                        Question 125 of 140125. Question- Assertion (A): Food additives are the chemicals added to food for specialized functions.
 Reasoning (R): Monosodium glutamate is a chemical used to enhance the flavor of food. Correct
 Explanation Food additives: These are the chemicals added to food for specialized functions. Incorrect
 Explanation Food additives: These are the chemicals added to food for specialized functions. 
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                        Question 126 of 140126. Question- What is the percentage of people employed in agriculture worldwide?
 Correct
 Explanation 40% of today’s global population works in agriculture, making it the single largest employment in the world. Incorrect
 Explanation 40% of today’s global population works in agriculture, making it the single largest employment in the world. 
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                        Question 127 of 140127. Question- What is the purpose of adding preservatives in food?
 Correct
 Incorrect
 
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                        Question 128 of 140128. Question- Match
 Saccharin i) Colorant Curcumin ii) Antioxidant Benzoic acid iii) Artificial sweetener Carotene iv) Preservative Correct
 Incorrect
 
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                        Question 129 of 140129. Question- Which of this additive is used to prevent the oxidation of food?
 Correct
 Explanation  Incorrect Incorrect
 Explanation  
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                        Question 130 of 140130. Question- Which of these are applied in a forensic chemistry?
 Correct
 Explanation Forensic chemistry applies scientific principles, techniques, and methods to the investigation of crime. Incorrect
 Explanation Forensic chemistry applies scientific principles, techniques, and methods to the investigation of crime. 
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                        Question 131 of 140131. Question- How many steps of investigation in a crime is worked out by the forensic chemists?
 Correct
 Explanation In general, forensic chemists work in four steps in the investigation of crime. Incorrect
 Explanation In general, forensic chemists work in four steps in the investigation of crime. 
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                        Question 132 of 140132. Question- Which of these evidences can be chemically analyzed in a crime?
 Correct
 Explanation Analysis of evidences: In criminal cases, chemists analyze substances such as blood and DNA to attempt to determine when and by whom the crime was committed. Incorrect
 Explanation Analysis of evidences: In criminal cases, chemists analyze substances such as blood and DNA to attempt to determine when and by whom the crime was committed. 
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                        Question 133 of 140133. Question- Choose the Incorrect statements.
 i) Finger print is the most important evidences in crime investigation. ii) Fingerprints on smooth surfaces can be made visible by applying dark or light powders. iii) Occult fingerprints can also be made visible by using dark or light powders. Correct
 Explanation Finger print: Finger print is one of the most important evidences in crime investigation. Fingerprints on smooth surfaces can often be made visible by the application of light or dark powder, but fingerprints on cheques or other documents are often occult (hidden). Incorrect
 Explanation Finger print: Finger print is one of the most important evidences in crime investigation. Fingerprints on smooth surfaces can often be made visible by the application of light or dark powder, but fingerprints on cheques or other documents are often occult (hidden). 
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                        Question 134 of 140134. Question- Which is used to make the occult fingerprints visible?##
 Correct
 Explanation Occult fingerprints are sometimes made visible by the use of ninhydrin which turns purple due to reaction with amino acids present in perspiration. Incorrect
 Explanation Occult fingerprints are sometimes made visible by the use of ninhydrin which turns purple due to reaction with amino acids present in perspiration. 
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                        Question 135 of 140135. Question- Which of these are used to make the fingerprints visible?###
 Correct
 Explanation Fingerprints or other marks are also sometimes made visible by exposure to high-powered laser light. Cyanoacrylate ester fumes from glue are used with fluorescent dyes to make the fingerprints visible. Incorrect
 Explanation Fingerprints or other marks are also sometimes made visible by exposure to high-powered laser light. Cyanoacrylate ester fumes from glue are used with fluorescent dyes to make the fingerprints visible. 
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                        Question 136 of 140136. Question- Assertion (A): Biometrics is the study and analysis of human body prints.
 Reasoning(R): The biometric system compares the body prints of stored specimen data with unknown person data. Correct
 Explanation Biometrics: The science that involves the study and analysis of human body prints is known as biometrics. The biometric system compares the body prints to the specimen data stored in the system to verify the identity of a person. Incorrect
 Explanation Biometrics: The science that involves the study and analysis of human body prints is known as biometrics. The biometric system compares the body prints to the specimen data stored in the system to verify the identity of a person. 
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                        Question 137 of 140137. Question- Which of these chemicals is not present in the alcohol test equipment?
 Correct
 Explanation Alcohol test: Drinkers can be easily identified by the use of applied chemistry. The person being tested blows through a tube which bubbles the breath through a solution of chemicals containing sulfuric acid, potassium dichromate, water, and silver nitrate. Incorrect
 Explanation Alcohol test: Drinkers can be easily identified by the use of applied chemistry. The person being tested blows through a tube which bubbles the breath through a solution of chemicals containing sulfuric acid, potassium dichromate, water, and silver nitrate. 
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                        Question 138 of 140138. Question- Which of this reaction converts dichromate to chromic ion in the alcohol test?
 Correct
 Explanation Oxidation of the alcohol results in the reduction of dichromate to chromic ion with a corresponding change in color from orange to green. Incorrect
 Explanation Oxidation of the alcohol results in the reduction of dichromate to chromic ion with a corresponding change in color from orange to green. 
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                        Question 139 of 140139. Question- Which of these statements are not true regarding the alcohol test equipment?
 Correct
 Explanation In alcohol test equipment an electrical device employing a photocell compares the color of the test solution with a standard solution, giving a quantitative determination of the alcohol content. The test provides a quick and reproducible determination of the amount of alcohol in a person’s breath and is a numerical measure of the amount of alcohol in the bloodstream. Incorrect
 Explanation In alcohol test equipment an electrical device employing a photocell compares the color of the test solution with a standard solution, giving a quantitative determination of the alcohol content. The test provides a quick and reproducible determination of the amount of alcohol in a person’s breath and is a numerical measure of the amount of alcohol in the bloodstream. 
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                        Question 140 of 140140. Question- What are the applications of applied chemistry?
 Correct
 Explanation Applications of Applied Chemistry - Many of the advantages of applied chemistry are around us. It is inevitable.
- Applied chemistry has given us innumerous synthetic materials to lead our day to day life.
- The applied chemistry makes a most important contribution to our society.
- It makes a major contribution to the country’s economic development and plays vital role worldwide.
- The products of applied chemistry are so widespread that they are used in our daily.
 Incorrect
 Explanation Applications of Applied Chemistry - Many of the advantages of applied chemistry are around us. It is inevitable.
- Applied chemistry has given us innumerous synthetic materials to lead our day to day life.
- The applied chemistry makes a most important contribution to our society.
- It makes a major contribution to the country’s economic development and plays vital role worldwide.
- The products of applied chemistry are so widespread that they are used in our daily.
 
Leaderboard: Applied Chemistry Online Test 9th Science Lesson 16 Questions in English
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