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PERIODIC CLASSIFICATION OF ELEMENTS
Unit – IV PERIODIC CLASSIFICATION OF ELEMENTS ( CHEMISTRY )
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Question 1 |
Classification of elements into two division, namely metals and non-metals was firstly attempted by……..
Dobereiner | |
Lavoisier | |
Mandaleev |
Question 2 |
In Mendeleev’s periodic table, all the elements are sorted in the periodic functions of their ……………..
Mass number | |
Atomic number |
Question 3 |
One of the coinage metal is …………..
Copper | |
Sodium | |
Nickel |
Question 4 |
Liquid metal at room temperature is ……………
Mercury | |
Bromine | |
Tin |
Question 5 |
Osmium is the heaviest metal. It is …………… time heavier than iron,
221/2 | |
3 | |
about half |
Question 6 |
Metalloids have some metallic properties and some non-metallic properties. An example for metalloid is ………
Silicon | |
Argon | |
Iodine |
Question 7 |
Bronze is an alloy of …………..
Copper and tin | |
Silver and tin | |
Copper and silver |
Question 8 |
An alloy used in manufacturing aircraft parts is ………………
Solder | |
Brass | |
Duralumin |
Question 9 |
Which of the following metals does not liberate H2 from dilute acids?
Zinc | |
Iron | |
Tin | |
Lead |
Question 10 |
Which of the following metals can be displaced by Zn to form their salt solution?
iron | |
Copper | |
Silver | |
Gold |
Question 11 |
Number of groups in Mendelee’s Periodic table is …………..
8 | |
9 | |
10 |
Question 12 |
Number of periods in Mendeleev’s periodic table is …………
6 | |
7 | |
8 |
Question 13 |
The scientist who classified elements into metals and non-metals,
Dobereiner | |
Lavoisier | |
Newland | |
Lother Meyer |
Question 14 |
The law of Triads was proposed by …………….
Lavoisier | |
Mendeleev | |
Newland | |
Dobereiner |
Question 15 |
The Law of Octaves was proposed by …………..
Dobereiner | |
Mendelev | |
Newland | |
Lavoisier |
Question 16 |
The scientist who plotted atomic weight against atomic volume of various elements.
Mendeleev | |
Newland | |
Lavoisier | |
Lothar Meyer |
Question 17 |
The element in the first period of the periodic table
Lithium | |
Magnesium | |
Helium | |
Carbon |
Question 18 |
An example of Alkali metals
Sodium | |
Calcium | |
Magnesium | |
Aluminum |
Question 19 |
An example of Transition metal.
Sodium | |
Potassium | |
Iron | |
Calcium |
Question 20 |
An example for metalloids.
Sodium | |
Potassium | |
Silicon | |
Calcium |
Question 21 |
The metal which is the best conductor of electricity.
mercury | |
magnesium | |
copper | |
silver |
Question 22 |
…….. is the lightest metal.
sodium | |
calcium | |
lithium | |
potassium |
Question 23 |
The non-metal which is a good conductor of electricity.
Hydrogen | |
Chlorine | |
Graphite | |
Neon |
Question 24 |
……….. is the heaviest metal.
Iron | |
Lithium | |
Aluminium | |
Osmium |
Question 25 |
……. Has the highest melting point.
sodium | |
potassium | |
Tungsten | |
Iron |
Question 26 |
The most reactive metal which is at the top of the reactivity series.
Sodium | |
Silver | |
copper | |
potassium |
Question 27 |
The least reactive metal
sodium | |
potassium | |
magnesium | |
platinum |
Question 28 |
The alloy used to make Aircraft parts.
steel | |
bronze | |
duralumin | |
solder |
Question 29 |
The metal which melts in the hand (at the temperature of human body)
Mercury | |
Gallium | |
Sodium | |
Potassium |
Question 30 |
The alloy which is used for making status.
Brass | |
Silver | |
Bronze | |
Steel |
Question 31 |
The alloy used for joining metal surfaces without melting them.
Duralumin | |
Brass | |
Steel | |
Solder |
Question 32 |
Amalgam is an alloy in which one of the constituents is …………….
Sodium | |
Potassium | |
Mercury | |
Iron |
Question 33 |
The Law of Triads was proposed by …………….
Newland | |
Dobereiner |
Question 34 |
…………… is a metalloid.
Germanium | |
Gallium |
Question 35 |
An example for least reactive metal.
Sodium | |
Silver |
Question 36 |
Atoms of one metal randomly take the place of atoms of another metal in …………. alloy.
Substitutional | |
Interstitial |
Question 37 |
Amalgam is an alloy in which one of the constituents is ……………
Mercury | |
Sodium | |
Silver |
Question 38 |
Match the following:
- Lavoisier - a) Law of Triads
- Newland - b) Metals and non-metals
- Lothar Meyer - c) law of Octaves
- Doberenier - d) Atomic weight Atomic volume curve
2 3 4 1 | |
1 4 2 3 | |
4 1 2 3 | |
3 2 1 4 |
Question 39 |
Match the following:
- Alkali metal - a) Calcium
- Alkaline earth metal - b) Germanium
- Transition metal - c) Sodium
- Metalfoid - d) Iron
2 4 1 3 | |
1 4 2 3 | |
4 1 2 3 | |
2 3 4 1 |
Question 40 |
Match the following:
- Mercury - a) Solder
- Most reactive - b) Liquid non-metal
- Bromine - c) Sodium
- Alloy - d) Liquid metal
2 4 1 3 | |
3 1 2 4 | |
1 4 2 3 | |
2 3 4 1 |
Question 41 |
Match the following:
- Duralumin - a) Cooking utensils
- Bronze - b) window and door fitting
- Steel - c) Aircraft parts
- Solder - d) Statues
- Brass - e) Tin and lead
2 4 1 3 5 | |
3 5 1 2 4 | |
5 1 4 2 3 | |
2 3 4 1 5 |
Question 42 |
- Assertion (A) : Newland arranged the elements in the ascending order of atomic masses and found that the eight element had the same properties as the first.
- Reason (R) : As it resembled the musical octaves, he called this arrangement the law of octaves.
A is right, R is wrong | |
A is wrong, R is right | |
A is right, R explains A | |
R does not explain A |
Question 43 |
- Assertion (A) : Lavoisier proposed the law of Triads.
- Reason (R) : There are seven periods in the periodic table.
A is right, R is wrong | |
A is wrong, R is right | |
A is right, R explains A | |
R does not explain A |
Question 44 |
- Assertion (A) : Aluminium combines with oxygen to form a layer of Aluminium oxide.
- Reason (R) : When metals like Aluminium react with dilute hydrochloric acid, Hydrogen is liberated.
A is right, R is wrong | |
A is wrong, R is right | |
A is right, R explains A | |
R does not explain A |
Question 45 |
- Assertion (A) : Sulphur burns in air to form sulphur dioxide.
- Reason (R) : Phosphorous burns in air to form phosphorous pentoxide.
A is right, R is wrong | |
A is wrong, R is right | |
A is right, R explains A | |
Both A and R are correct |
Question 46 |
- Assertion (A) : Sodium is at the top of the reactivity series.
- Reason (R) : Highly reactive metals occupy the top portion of the reactivity series.
A is right, R is wrong | |
A is wrong, R is right | |
A is correct, R explains A | |
Both A and R are correct |
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