Acids, Bases And Salts Online Test 9th Science Lesson 14 Questions in English
Acids, Bases And Salts Online Test 9th Science Lesson 14 Questions in English
Quiz-summary
0 of 80 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
Information
AAZZAAZZ
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 80 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
| Average score |  | 
| Your score |  | 
Categories
- Not categorized 0%
| Pos. | Name | Entered on | Points | Result | 
|---|---|---|---|---|
| Table is loading | ||||
| No data available | ||||
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- Answered
- Review
- 
                        Question 1 of 801. Question1. Which are the chemical substances used in everyday life? Correct
 Soil, air, water, all the life forms and the materials that they use are all consist of chemicals. Out of such chemicals, acids, bases and salts are mostly used in everyday life. Incorrect
 Soil, air, water, all the life forms and the materials that they use are all consist of chemicals. Out of such chemicals, acids, bases and salts are mostly used in everyday life. 
- 
                        Question 2 of 802. Question2. Which of this acid is secreted in human stomach? Correct
 Our body metabolism is carried out by means of hydrochloric acid secreted in our stomach. Incorrect
 Our body metabolism is carried out by means of hydrochloric acid secreted in our stomach. 
- 
                        Question 3 of 803. Question3. Assertion (A): Acids forms hydrogen ions in the aqueous solution. 
 Reasoning (R): Base compounds forms hydroxyl ions in the aqueous solution.Correct
 An acid is a the compound which is capable of forming hydrogen ions (H+) in aqueous solution whereas a base is a compound that forms hydroxyl ions (OH–) in solution. Incorrect
 An acid is a the compound which is capable of forming hydrogen ions (H+) in aqueous solution whereas a base is a compound that forms hydroxyl ions (OH–) in solution. 
- 
                        Question 4 of 804. Question4. Which of this chemical element is neutral? Correct
 When an acid and a base react with each other a neutral product is formed which is called salt. Incorrect
 When an acid and a base react with each other a neutral product is formed which is called salt. 
- 
                        Question 5 of 805. Question5. What is the taste of an acid? Correct
 A certain type of chemical compounds present in them gives sour taste. These are called acids. Substances with sour taste are called acids. Incorrect
 A certain type of chemical compounds present in them gives sour taste. These are called acids. Substances with sour taste are called acids. 
- 
                        Question 6 of 806. Question6. What is the root word of Acid? Correct
 The word ‘acid’ is derived from the Latin name “acidus”. Incorrect
 The word ‘acid’ is derived from the Latin name “acidus”. 
- 
                        Question 7 of 807. Question7. Match 
 A. Tea i) Oxalic acid
 B. Vinegar ii) Tannic acid
 C. Orange iii) Acetic acid
 D. Tomato iv) Ascorbic acidCorrect
 Incorrect
 
- 
                        Question 8 of 808. Question8. When Svante Arrhenius proposed a theory on acids and base? Correct
 In 1884 a Swedish chemist Svante Arrhenius proposed a theory on acids and bases. Incorrect
 In 1884 a Swedish chemist Svante Arrhenius proposed a theory on acids and bases. 
- 
                        Question 9 of 809. Question9. Arrhenius theory produces ____ or ____ ions in aqueous solution. Correct
 According to Arrhenius theory an acid is a substance which furnishes H+ ions or H3O+ ions in aqueous solution. Incorrect
 According to Arrhenius theory an acid is a substance which furnishes H+ ions or H3O+ ions in aqueous solution. 
- 
                        Question 10 of 8010. Question10. Which ion is separated from HCl molecule in the presence of water? Correct
 Hydrogen ions in HCl are produced in the presence of water. The separation of H+ ion from HCl molecules cannot occur in the absence of water. Incorrect
 Hydrogen ions in HCl are produced in the presence of water. The separation of H+ ion from HCl molecules cannot occur in the absence of water. 
- 
                        Question 11 of 8011. Question11. Which of these statements are not true? Correct
 Hydrogen ions cannot exist alone but they exist in combined state with water molecules. Thus hydrogen ions must always be H+ (or) Hydronium (H3O+). Incorrect
 Hydrogen ions cannot exist alone but they exist in combined state with water molecules. Thus hydrogen ions must always be H+ (or) Hydronium (H3O+). 
- 
                        Question 12 of 8012. Question12. Assertion (A): The Hydrogen containing substances are classified as acids. 
 Reasoning (R): All the acids contain one or more hydrogen.Correct
 All acids essentially contain one or more hydrogen. But all the hydrogen containing substances are not acids. For example, methane (CH4) and ammonia (NH3) also contain hydrogen. But they do not produce H+ ions in aqueous solution. Incorrect
 All acids essentially contain one or more hydrogen. But all the hydrogen containing substances are not acids. For example, methane (CH4) and ammonia (NH3) also contain hydrogen. But they do not produce H+ ions in aqueous solution. 
- 
                        Question 13 of 8013. Question13. Which of these acids has three replaceable hydrogen ions? Correct
 Incorrect
 
- 
                        Question 14 of 8014. Question14. Choose the correct statements. 
 i) Organic acids are present in plants and living things.
 ii) Hydrochloric acid is an example of organic acid.Correct
 Based on their sources: Organic Acids: Acids present in plants and animals (living things) are organic acids. Example: HCOOH, CH3COOH Incorrect
 Based on their sources: Organic Acids: Acids present in plants and animals (living things) are organic acids. Example: HCOOH, CH3COOH 
- 
                        Question 15 of 8015. Question15. Which of these is the source of the Inorganic acid? Correct
 Inorganic Acids: Acids prepared from rocks and minerals are inorganic acids or mineral acids. Example: HCl, HNO3, H2SO4 Incorrect
 Inorganic Acids: Acids prepared from rocks and minerals are inorganic acids or mineral acids. Example: HCl, HNO3, H2SO4 
- 
                        Question 16 of 8016. Question16. State the example of a monobasic acid? Correct
 Monobasic Acid: Acid that contains only one replaceable hydrogen atom per molecule is called monobasic acid. It gives one hydrogen ion per molecule of the acid in solution. Example: HCl, HNO3 Incorrect
 Monobasic Acid: Acid that contains only one replaceable hydrogen atom per molecule is called monobasic acid. It gives one hydrogen ion per molecule of the acid in solution. Example: HCl, HNO3 
- 
                        Question 17 of 8017. Question17. Choose the correct statements. 
 i) Basicity refers the number of replaceable hydrogen atoms in one molecule of an acid.
 ii) The total number of hydrogen atoms in the molecular formula classifies the basicity.
 iii) CH3COOH is a tribasic acid.Correct
 For acids, we use the term basicity that refers to the number of replaceable hydrogen atoms present in one molecule of an acid. For example, acetic acid (CH3COOH) has four hydrogen atoms but only one can be replaced. Hence it is monobasic. Incorrect
 For acids, we use the term basicity that refers to the number of replaceable hydrogen atoms present in one molecule of an acid. For example, acetic acid (CH3COOH) has four hydrogen atoms but only one can be replaced. Hence it is monobasic. 
- 
                        Question 18 of 8018. Question18. Assertion (A): Acid which gives two hydrogen ions per molecule of acid are called dibasic acid. 
 Reasoning (R): H3PO4 is an example for the dibasic acid.Correct
 Dibasic Acid: An acid which gives two hydrogen ions per molecule of the acid in solution. Example: H2SO4, H2CO3 
 Tribasic Acid: An acid which gives three hydrogen ions per molecule of the acid in solution. Example: H3PO4Incorrect
 Dibasic Acid: An acid which gives two hydrogen ions per molecule of the acid in solution. Example: H2SO4, H2CO3 
 Tribasic Acid: An acid which gives three hydrogen ions per molecule of the acid in solution. Example: H3PO4
- 
                        Question 19 of 8019. Question19. Choose the correct statements. 
 i) Acids do not get ionized in water completely.
 ii) A strong acid completely ionize in water.
 iii) Weak acids do not ionize in water.Correct
 Acids get ionized in water (produce H+ ions) completely or partially. Based on the extent of ionization acids are classified as below. 
 Strong Acids: These are acids that ionize completely in water. Example: HCl
 Weak Acids: These are acids that ionize partially in water. Example: CH3COOH.Incorrect
 Acids get ionized in water (produce H+ ions) completely or partially. Based on the extent of ionization acids are classified as below. 
 Strong Acids: These are acids that ionize completely in water. Example: HCl
 Weak Acids: These are acids that ionize partially in water. Example: CH3COOH.
- 
                        Question 20 of 8020. Question20. Which of these causes the ionization? Correct
 Ionization is the condition of being dissociated into ions by heat or radiation or chemical reactions or electrical discharge. Incorrect
 Ionization is the condition of being dissociated into ions by heat or radiation or chemical reactions or electrical discharge. 
- 
                        Question 21 of 8021. Question21. How many types of acids are classified based on the concentration? Correct
 Concentrated Acid: It has relatively large amount of acid dissolved in a solvent. Dilute Acid: It has relatively smaller amount of acid dissolved in solvent. Incorrect
 Concentrated Acid: It has relatively large amount of acid dissolved in a solvent. Dilute Acid: It has relatively smaller amount of acid dissolved in solvent. 
- 
                        Question 22 of 8022. Question22. Which of these are the properties of acids? Correct
 Properties of Acids: They have sour taste. Their aqueous solutions conduct electricity since they contain ions. Acids turn blue litmus red. Incorrect
 Properties of Acids: They have sour taste. Their aqueous solutions conduct electricity since they contain ions. Acids turn blue litmus red. 
- 
                        Question 23 of 8023. Question23. Which of these will react with acids and give hydrogen gas? Correct
 Acids react with active metals to give hydrogen gas. 
 Mg + H2SO4 → MgSO4 + H2
 Zn + 2HCl → ZnCl2 + H2Incorrect
 Acids react with active metals to give hydrogen gas. 
 Mg + H2SO4 → MgSO4 + H2
 Zn + 2HCl → ZnCl2 + H2
- 
                        Question 24 of 8024. Question24. Which gas is resulted in the reaction of acids with metal carbonates? Correct
 Acids react with metal carbonate and metal hydrogen carbonate to give carbon dioxide. 
 Na2CO3 + 2HCl → 2NaCl + H2O + CO2 ↑
 NaHCO3 + HCl → NaCl + H2O + CO2 ↑Incorrect
 Acids react with metal carbonate and metal hydrogen carbonate to give carbon dioxide. 
 Na2CO3 + 2HCl → 2NaCl + H2O + CO2 ↑
 NaHCO3 + HCl → NaCl + H2O + CO2 ↑
- 
                        Question 25 of 8025. Question25. Which of these is not involved in a neutralization reaction? Correct
 Acids react with metallic oxides to give salt and water. CaO + H2SO4 → CaSO4 + H2O 
 Acids react with bases to give salt and water. HCl + NaOH → NaCl + H2O
 The reaction is known as neutralization reaction.Incorrect
 Acids react with metallic oxides to give salt and water. CaO + H2SO4 → CaSO4 + H2O 
 Acids react with bases to give salt and water. HCl + NaOH → NaCl + H2O
 The reaction is known as neutralization reaction.
- 
                        Question 26 of 8026. Question26. What are the end products of a neutralization reaction? Correct
 Acids react with bases to give salt and water. The reaction is known as neutralization reaction Incorrect
 Acids react with bases to give salt and water. The reaction is known as neutralization reaction 
- 
                        Question 27 of 8027. Question27. Which acid is called as the King of chemicals? Correct
 Sulphuric acid is called King of Chemicals because it is used in the preparation of many other compounds. It is used in car batteries also. Incorrect
 Sulphuric acid is called King of Chemicals because it is used in the preparation of many other compounds. It is used in car batteries also. 
- 
                        Question 28 of 8028. Question28. Which of this acid is used as a food preservative? Correct
 Hydrochloric acid is used as a cleansing agent in toilets. Citric acid is used in the preparation of effervescent salts and as a food preservative. Incorrect
 Hydrochloric acid is used as a cleansing agent in toilets. Citric acid is used in the preparation of effervescent salts and as a food preservative. 
- 
                        Question 29 of 8029. Question29. Which of these are manufactured by Nitric Acid? Correct
 Nitric acid is used in the manufacture of fertilizers, dyes, paints and drugs. Incorrect
 Nitric acid is used in the manufacture of fertilizers, dyes, paints and drugs. 
- 
                        Question 30 of 8030. Question30. Which of these is not a usage of Oxalic acid? Correct
 Oxalic acid is used to clean iron and manganese deposits from quartz crystals. It is also used as bleach for wood and removing black stains. Incorrect
 Oxalic acid is used to clean iron and manganese deposits from quartz crystals. It is also used as bleach for wood and removing black stains. 
- 
                        Question 31 of 8031. Question31. Which of this acid is used in aerated drinks? Correct
 Carbonic acid is used in aerated drinks. Tartaric acid is a constituent of baking powder. Incorrect
 Carbonic acid is used in aerated drinks. Tartaric acid is a constituent of baking powder. 
- 
                        Question 32 of 8032. Question32. Choose the correct statements. 
 i) Acids ionize in water which determines its properties.
 ii) Acids partially ionize in organic solvents.
 iii) HCl is dissolved in ethanol and produce H+ and Cl- ions.Correct
 Acids show their properties only when dissolved in water. In water, they ionize to form H+ ions which determine the properties of acids. They do not ionize in organic solvents. For example when HCl is dissolved in water it produces H+ ions and Cl- ions whereas in organic solvents like ethanol they do not ionize and remain as molecule. Incorrect
 Acids show their properties only when dissolved in water. In water, they ionize to form H+ ions which determine the properties of acids. They do not ionize in organic solvents. For example when HCl is dissolved in water it produces H+ ions and Cl- ions whereas in organic solvents like ethanol they do not ionize and remain as molecule. 
- 
                        Question 33 of 8033. Question33. Assertion (A): Aquaregia is a mixture of HCl and HNO3. 
 Reasoning (R): Gold and silver react with HCl and HNO3.Correct
 Metals like gold and silver are not reactive with either HCl or HNO3. But the mixture of these two acids can dissolve gold. This mixture is called Aquaregia. Incorrect
 Metals like gold and silver are not reactive with either HCl or HNO3. But the mixture of these two acids can dissolve gold. This mixture is called Aquaregia. 
- 
                        Question 34 of 8034. Question34. State the properties of Aquaregia. 
 i) HCl and HNO3 mixture of molar ratio 3:1
 ii) A yellow-orange fuming liquid.
 iii) Highly corrosive can dissolve gold.Correct
 Aquaregia is a mixture of hydrochloric acid and nitric acid prepared optimally in a molar ratio of 3:1. It is a yellow-orange fuming liquid. It is a highly corrosive liquid, able to attack gold and other substances. Incorrect
 Aquaregia is a mixture of hydrochloric acid and nitric acid prepared optimally in a molar ratio of 3:1. It is a yellow-orange fuming liquid. It is a highly corrosive liquid, able to attack gold and other substances. 
- 
                        Question 35 of 8035. Question35. What is the boiling point of the Aquaregia? Correct
 Aquaregia 
 Chemical formula: 3 HCl + HNO3
 Solubility in Water: Miscible in water
 Melting point: – 42°C (- 44°F, 231K)
 Boiling point: 108°C (226°F, 381K)Incorrect
 Aquaregia 
 Chemical formula: 3 HCl + HNO3
 Solubility in Water: Miscible in water
 Melting point: – 42°C (- 44°F, 231K)
 Boiling point: 108°C (226°F, 381K)
- 
                        Question 36 of 8036. Question36. Which language is the origin for the word Aquaregia? Correct
 The term Aquaregia is a Latin phrase meaning ‘King’s Water’. The name reflects the ability of aquaregia to dissolve the noble metals such as gold, platinum and palladium. Incorrect
 The term Aquaregia is a Latin phrase meaning ‘King’s Water’. The name reflects the ability of aquaregia to dissolve the noble metals such as gold, platinum and palladium. 
- 
                        Question 37 of 8037. Question37. What are the uses of aquaregia? Correct
 Uses of Aquaregia 
 1. It is used chiefly to dissolve metals such as gold and platinum.
 2. It is used for cleaning and refining gold.Incorrect
 Uses of Aquaregia 
 1. It is used chiefly to dissolve metals such as gold and platinum.
 2. It is used for cleaning and refining gold.
- 
                        Question 38 of 8038. Question38. According to Arrhenius theory Bases, 
 i) Ionize in water to form hydroxyl ions.
 ii) React with acids and result in salt and water.Correct
 According to Arrhenius theory bases are substances that ionize in water to form hydroxyl ions (OH–). There are some metal oxides which give salt and water on reaction with acids. These are also called bases. Incorrect
 According to Arrhenius theory bases are substances that ionize in water to form hydroxyl ions (OH–). There are some metal oxides which give salt and water on reaction with acids. These are also called bases. 
- 
                        Question 39 of 8039. Question39. What is the name of water soluble base substances soluble? Correct
 Bases that are soluble in water are called alkalis. A base reacts with an acid to give salt and water only. Base + Acid → Salt + Water Incorrect
 Bases that are soluble in water are called alkalis. A base reacts with an acid to give salt and water only. Base + Acid → Salt + Water 
- 
                        Question 40 of 8040. Question40. Which of these is not an alkali? Correct
 Sodium hydroxide ionizes in water to give hydroxyl ions and thus get dissolved in water. So it is an alkali. NaOH (aq) → Na+ (aq) + OH- (aq) Incorrect
 Sodium hydroxide ionizes in water to give hydroxyl ions and thus get dissolved in water. So it is an alkali. NaOH (aq) → Na+ (aq) + OH- (aq) 
- 
                        Question 41 of 8041. Question41. Assertion (A): All the bases are alkalis. 
 Reasoning (R): All alkalis are not bases.Correct
 All alkalis are bases but not all bases are alkalis. For example: NaOH and KOH are alkalis whereas Al (OH)3 and Zn(OH)2 are bases. Incorrect
 All alkalis are bases but not all bases are alkalis. For example: NaOH and KOH are alkalis whereas Al (OH)3 and Zn(OH)2 are bases. 
- 
                        Question 42 of 8042. Question42. How many number of hydroxyl ions are present in Calcium hydroxide? Correct
 Incorrect
 
- 
                        Question 43 of 8043. Question43. Identify the incorrect match. 
 A. Diacidic Base i) Magnesium Hydroxide
 B. Monoacidic Base ii) Zinc Hydroxide
 C. Triacidic Base iii) Aluminum HydroxideCorrect
 Explanation 
 Classification of Bases: Based on their Acidity
 Monoacidic Base: It is a base that ionizes in water to give one hydroxide ion per molecule. Example: NaOH, KOH
 Diacidic Base: It is a base that ionizes in water to give two hydroxide ions per molecule. Example: Ca(OH)2. Mg(OH)2
 Triacidic Base: It is a base that ionizes in water to give three hydroxide ions per molecule. Example: Al(OH)3, Fe(OH)3Incorrect
 Explanation 
 Classification of Bases: Based on their Acidity
 Monoacidic Base: It is a base that ionizes in water to give one hydroxide ion per molecule. Example: NaOH, KOH
 Diacidic Base: It is a base that ionizes in water to give two hydroxide ions per molecule. Example: Ca(OH)2. Mg(OH)2
 Triacidic Base: It is a base that ionizes in water to give three hydroxide ions per molecule. Example: Al(OH)3, Fe(OH)3
- 
                        Question 44 of 8044. Question44. Which of the following is correct based on the concentration of alkalis. Correct
 Based on concentration 
 Concentrated Alkali: It is an alkali having a relatively high percentage of alkali in its aqueous solution. Dilute Alkali: It is an alkali having a relatively low percentage of alkali in its aqueous solution.Incorrect
 Based on concentration 
 Concentrated Alkali: It is an alkali having a relatively high percentage of alkali in its aqueous solution. Dilute Alkali: It is an alkali having a relatively low percentage of alkali in its aqueous solution.
- 
                        Question 45 of 8045. Question45. Choose the Incorrect statements. 
 i) Strong Bases ionize completely in the aqueous solution.
 ii) Sodium Hydroxide is classified as weak base.Correct
 Weak Bases: These are bases that ionize partially in aqueous solution. Example: NH4OH, Ca(OH)2 Incorrect
 Weak Bases: These are bases that ionize partially in aqueous solution. Example: NH4OH, Ca(OH)2 
- 
                        Question 46 of 8046. Question46. Acidity of a base means the number of replaceable ________ in _______of a base. Correct
 The term acidity is used for base which means the number of replaceable hydroxyl groups present in one molecule of a base. Incorrect
 The term acidity is used for base which means the number of replaceable hydroxyl groups present in one molecule of a base. 
- 
                        Question 47 of 8047. Question47. Choose the correct statements regarding the properties of a base. 
 i) Red litmus is turned to blue.
 ii) Bitter taste
 iii) Aqueous solution is soapyCorrect
 Properties of Bases 
 a) They have bitter taste.
 b) Their aqueous solutions have soapy touch.
 c) They turn red litmus blue.
 d) Their aqueous solutions conduct electricity.Incorrect
 Properties of Bases 
 a) They have bitter taste.
 b) Their aqueous solutions have soapy touch.
 c) They turn red litmus blue.
 d) Their aqueous solutions conduct electricity.
- 
                        Question 48 of 8048. Question48. What is the resultant gas of Base reacting with metal? Correct
 Bases react with metals to form salt with the liberation of hydrogen gas. 
 Zn + 2 NaOH → Na2ZnO2 + H2↑Incorrect
 Bases react with metals to form salt with the liberation of hydrogen gas. 
 Zn + 2 NaOH → Na2ZnO2 + H2↑
- 
                        Question 49 of 8049. Question49. What is the nature of non-metallic oxides? Correct
 Bases react with non-metallic oxides to produce salt and water. Since this is similar to the reaction between a base and an acid we can conclude that nonmetallic oxides are acidic in nature. Ca(OH)2 + CO2 → CaCO3+ H2O Incorrect
 Bases react with non-metallic oxides to produce salt and water. Since this is similar to the reaction between a base and an acid we can conclude that nonmetallic oxides are acidic in nature. Ca(OH)2 + CO2 → CaCO3+ H2O 
- 
                        Question 50 of 8050. Question50. Define a neutralization reaction. Correct
 Explanation 
 Bases react with acids to form salt and water. KOH + HCl → KCl + H2O
 The above reaction between a base and an acid is known as Neutralization reaction.Incorrect
 Explanation 
 Bases react with acids to form salt and water. KOH + HCl → KCl + H2O
 The above reaction between a base and an acid is known as Neutralization reaction.
- 
                        Question 51 of 8051. Question51. Which of these results in ammonium gas while heating with ammonium salts? Correct
 On heating with ammonium salts, bases give ammonia gas. NaOH + NH4Cl → NaCl + H2O + NH3↑ Incorrect
 On heating with ammonium salts, bases give ammonia gas. NaOH + NH4Cl → NaCl + H2O + NH3↑ 
- 
                        Question 52 of 8052. Question52. Which of these metals does not react with sodium hydroxide? Correct
 Few metals do not react with sodium hydroxide. Example: Cu, Ag, Cr Incorrect
 Few metals do not react with sodium hydroxide. Example: Cu, Ag, Cr 
- 
                        Question 53 of 8053. Question53. Match 
 A. Sodium Hydroxide i) Medicine
 B. Ammonium Hydroxide ii) White washes
 C. Calcium Hydroxide iii) Soap making
 D. Magnesium Hydroxide iv) Cloth stain removerCorrect
 Uses of Bases 
 (i) Sodium hydroxide is used in the manufacture of soap.
 (ii) Calcium hydroxide is used in white washing of building.
 (iii) Magnesium hydroxide is used as a medicine for stomach disorder.
 (iv) Ammonium hydroxide is used to remove grease stains from cloths.Incorrect
 Uses of Bases 
 (i) Sodium hydroxide is used in the manufacture of soap.
 (ii) Calcium hydroxide is used in white washing of building.
 (iii) Magnesium hydroxide is used as a medicine for stomach disorder.
 (iv) Ammonium hydroxide is used to remove grease stains from cloths.
- 
                        Question 54 of 8054. Question54. Choose the correct statements. 
 i) An acid turns blue litmus paper into red.
 ii) Phenolphthalein is colorless in acid medium.Correct
 Test with a litmus paper: An acid turns blue litmus paper into red. A base turns red litmus paper into blue. Test with an indicator Phenolphthalein: In acid medium, phenolphthalein is colorless. In basic medium, phenolphthalein is pink in color. Incorrect
 Test with a litmus paper: An acid turns blue litmus paper into red. A base turns red litmus paper into blue. Test with an indicator Phenolphthalein: In acid medium, phenolphthalein is colorless. In basic medium, phenolphthalein is pink in color. 
- 
                        Question 55 of 8055. Question55. In which of the medium the Methyl orange is pink color? Correct
 Test with an indicator Methyl orange: In acid medium, methyl orange is pink in color. In basic medium, methyl orange is yellow in color. Incorrect
 Test with an indicator Methyl orange: In acid medium, methyl orange is pink in color. In basic medium, methyl orange is yellow in color. 
- 
                        Question 56 of 8056. Question56. Match the color indicator of base. 
 A. Methyl Orange i) Pink
 B. Phenolphthalein ii) Blue
 C. Litmus iii) YellowCorrect
 Incorrect
 
- 
                        Question 57 of 8057. Question57. What does a pH scale measures? Correct
 A scale for measuring hydrogen ion concentration in a solution is called pH scale. Incorrect
 A scale for measuring hydrogen ion concentration in a solution is called pH scale. 
- 
                        Question 58 of 8058. Question58. What does p denote in a pH scale? Correct
 The ‘p’ in pH stands for ‘potenz’ in German meaning power. Incorrect
 The ‘p’ in pH stands for ‘potenz’ in German meaning power. 
- 
                        Question 59 of 8059. Question59. What is the maximum scale of a pH scale? Correct
 The pH scale is a set of numbers from 0 to 14 which is used to indicate whether a solution is acidic, basic or neutral. Incorrect
 The pH scale is a set of numbers from 0 to 14 which is used to indicate whether a solution is acidic, basic or neutral. 
- 
                        Question 60 of 8060. Question60. What is the pH value of a neutral solution? Correct
 Acids have pH less than 7, Bases have pH greater than 7 and a neutral solution has pH equal to 7. Incorrect
 Acids have pH less than 7, Bases have pH greater than 7 and a neutral solution has pH equal to 7. 
- 
                        Question 61 of 8061. Question61. Which of this salt is separated from the sea water? Correct
 When you say salt you may think of the common salt. Sea water contains many salts dissolved in it. Sodium chloride is separated from these salts. Incorrect
 When you say salt you may think of the common salt. Sea water contains many salts dissolved in it. Sodium chloride is separated from these salts. 
- 
                        Question 62 of 8062. Question62. Salts are, 
 i) It is a product of acid base reaction.
 ii) It produces only positive ions in water.Correct
 Salts are the products of the reaction between acids and bases. Salts produce positive ions and negative ions when dissolved in water. Incorrect
 Salts are the products of the reaction between acids and bases. Salts produce positive ions and negative ions when dissolved in water. 
- 
                        Question 63 of 8063. Question63. Which of this reaction produce a normal salt? Correct
 Explanation 
 Normal Salts: A normal salt is obtained by complete neutralization of an acid by a base.
 NaOH + HCl → NaCl + H2OIncorrect
 Explanation 
 Normal Salts: A normal salt is obtained by complete neutralization of an acid by a base.
 NaOH + HCl → NaCl + H2O
- 
                        Question 64 of 8064. Question64. Assertion (A): Acid salt is obtained by adding calculated amount of base to a polybasic acid. 
 Reasoning (R): Metals partially replace hydrogen ions of an acid.Correct
 Acid Salts: It is derived from the partial replacement of hydrogen ions of an acid by a metal. When a calculated amount of a base is added to a polybasic acid, acid salt is obtained. 
 NaOH + H2SO4 → NaHSO4 + H2OIncorrect
 Acid Salts: It is derived from the partial replacement of hydrogen ions of an acid by a metal. When a calculated amount of a base is added to a polybasic acid, acid salt is obtained. 
 NaOH + H2SO4 → NaHSO4 + H2O
- 
                        Question 65 of 8065. Question65. Which of these ions are partially replaced to form a Basic salt? Correct
 Basic Salts: Basic salts are formed by the partial replacement of hydroxide ions of a diacidic or triacidic base with an acid radical. Pb(OH)2 + HCl → Pb(OH)Cl + H2O Incorrect
 Basic Salts: Basic salts are formed by the partial replacement of hydroxide ions of a diacidic or triacidic base with an acid radical. Pb(OH)2 + HCl → Pb(OH)Cl + H2O 
- 
                        Question 66 of 8066. Question66. Which of these are the characteristics of a Double salt? Correct
 Double Salts: Double salts are formed by the combination of the saturated solution of two simple salts in equimolar ratio followed by crystallization. For example, potash alum is a mixture of potassium sulphate and aluminum sulphate. KAl(SO4)2·12H2O Incorrect
 Double Salts: Double salts are formed by the combination of the saturated solution of two simple salts in equimolar ratio followed by crystallization. For example, potash alum is a mixture of potassium sulphate and aluminum sulphate. KAl(SO4)2·12H2O 
- 
                        Question 67 of 8067. Question67. Choose the correct statements. 
 i) Salts are mostly liquids which boil at high temperature.
 ii) All Salts are soluble in water.
 iii) Salts are hygroscopic in nature.Correct
 Properties of Salts: Salts are mostly solids which melt as well as boil at high temperature. Most of the salts are soluble in water. For example, chloride salts of potassium and sodium are soluble in water. But silver chloride is insoluble in water. They are odorless, mostly white, cubic crystals or crystalline powder with salty taste. Salt is hygroscopic in nature. Incorrect
 Properties of Salts: Salts are mostly solids which melt as well as boil at high temperature. Most of the salts are soluble in water. For example, chloride salts of potassium and sodium are soluble in water. But silver chloride is insoluble in water. They are odorless, mostly white, cubic crystals or crystalline powder with salty taste. Salt is hygroscopic in nature. 
- 
                        Question 68 of 8068. Question68. Assertion (A): Salts having water of crystallization are hydrated salts. 
 Reasoning (R): Water molecules of salts are known as water of crystallization.Correct
 Many salts are found as crystals with water molecules. These water molecules are known as water of crystallization. Salts that contain water of crystallization are called hydrated salts. Incorrect
 Many salts are found as crystals with water molecules. These water molecules are known as water of crystallization. Salts that contain water of crystallization are called hydrated salts. 
- 
                        Question 69 of 8069. Question69. Choose the correct statements. 
 i) The water molecules hydrated to a salt is indicated after a dot in the chemical formula.
 ii) Copper sulphate pentahydrate has five water molecules only.Correct
 The number of molecules of water hydrated to a salt is indicated after a dot in its chemical formula. For example, copper sulphate crystal has five molecules of water for each molecule of copper sulphate. It is written as CuSO4.5H2O and named as copper sulphate pentahydrate. This water of crystallization makes the copper sulphate blue. When it is heated, it loses its water molecules and becomes white. Incorrect
 The number of molecules of water hydrated to a salt is indicated after a dot in its chemical formula. For example, copper sulphate crystal has five molecules of water for each molecule of copper sulphate. It is written as CuSO4.5H2O and named as copper sulphate pentahydrate. This water of crystallization makes the copper sulphate blue. When it is heated, it loses its water molecules and becomes white. 
- 
                        Question 70 of 8070. Question70. What are the qualities of an anhydrous salt? Correct
 Salts that do not contain water of crystallization are called anhydrous salt. They are generally found as powders. Incorrect
 Salts that do not contain water of crystallization are called anhydrous salt. They are generally found as powders. 
- 
                        Question 71 of 8071. Question71. Which of these studies are made by physically examining a salt? Correct
 The physical examination of the unknown salt involves the study of color, smell and density. This test is not much reliable. Incorrect
 The physical examination of the unknown salt involves the study of color, smell and density. This test is not much reliable. 
- 
                        Question 72 of 8072. Question72. What is the end product of salts reacting with concentrated Hydrochloric acid? Correct
 Flame Test: Certain salts on reacting with concentrated hydrochloric acid (HCl) form their chlorides. The paste of the mixture with con. HCl is introduced into the flame with the help of platinum wire. Incorrect
 Flame Test: Certain salts on reacting with concentrated hydrochloric acid (HCl) form their chlorides. The paste of the mixture with con. HCl is introduced into the flame with the help of platinum wire. 
- 
                        Question 73 of 8073. Question73. Match the color of flame and the inferred compounds. 
 A. K+ i) Green Fleshes
 B. Na+ ii) Brick red
 C. Ca2+ iii) Pink violet
 D. Zn2+ iv) Golden yellowCorrect
 Incorrect
 
- 
                        Question 74 of 8074. Question74. What gas is resulted if HCl is added with a carbonate salt? Correct
 When HCl is added with a carbonate salt it gives off CO2 gas with brisk effervescence. Incorrect
 When HCl is added with a carbonate salt it gives off CO2 gas with brisk effervescence. 
- 
                        Question 75 of 8075. Question75. Which of these is known as common salt? Correct
 Common Salt (Sodium Chloride – NaCl) It is used in our daily food and used as a preservative. Incorrect
 Common Salt (Sodium Chloride – NaCl) It is used in our daily food and used as a preservative. 
- 
                        Question 76 of 8076. Question76. What are the uses of Sodium Carbonate? Correct
 Washing Soda (Sodium Carbonate-Na2CO3) is used in softening hard water. It is used in glass, soap and paper industries. Incorrect
 Washing Soda (Sodium Carbonate-Na2CO3) is used in softening hard water. It is used in glass, soap and paper industries. 
- 
                        Question 77 of 8077. Question77. Choose the Incorrect statements regarding Sodium bicarbonate. 
 i) NaHCO3 is the formula for the Sodium bicarbonate also known as Baking soda.
 ii) Baking powder consists of baking soda and Oxalic acid.
 iii) It is also used in soda-acid fire extinguishers.Correct
 Baking Soda (Sodium bicarbonate -NaHCO3): It is used in making of baking powder which is a mixture of baking soda and tartaric acid. It is used in soda-acid fire extinguishers. Baking powder is used to make cakes and bread, soft and spongy. It neutralizes excess acid in the stomach and provides relief. Incorrect
 Baking Soda (Sodium bicarbonate -NaHCO3): It is used in making of baking powder which is a mixture of baking soda and tartaric acid. It is used in soda-acid fire extinguishers. Baking powder is used to make cakes and bread, soft and spongy. It neutralizes excess acid in the stomach and provides relief. 
- 
                        Question 78 of 8078. Question78. What is the chemical name for the bleaching powder? Correct
 Bleaching powder (Calcium Oxychloride – CaOCl2): It is used as disinfectant. It is used in textile industry for bleaching cotton and linen. Incorrect
 Bleaching powder (Calcium Oxychloride – CaOCl2): It is used as disinfectant. It is used in textile industry for bleaching cotton and linen. 
- 
                        Question 79 of 8079. Question79. What is the chemical formula for the Plaster of Paris? Correct
 Plaster of Paris (Calcium Sulphate Hemihydrate – CaSO4 .½ H2O) 
 i. It is used for plastering bones.
 ii. It is used for making casts for statues.Incorrect
 Plaster of Paris (Calcium Sulphate Hemihydrate – CaSO4 .½ H2O) 
 i. It is used for plastering bones.
 ii. It is used for making casts for statues.
- 
                        Question 80 of 8080. Question80. Which of the following is a double salt? Correct
 Potash alum is a chemical compound widely used as the potassium sulfate dodecahydrate. It is double salt that is used commonly in medicine and the water treatment process. Incorrect
 Potash alum is a chemical compound widely used as the potassium sulfate dodecahydrate. It is double salt that is used commonly in medicine and the water treatment process. 
Leaderboard: Acids, Bases And Salts Online Test 9th Science Lesson 14 Questions in English
| Pos. | Name | Entered on | Points | Result | 
|---|---|---|---|---|
| Table is loading | ||||
| No data available | ||||