Metals and Non-Metals

1

Which one of the following metals is used in the filaments of photo-electric cells that convert light energy into electric energy?

  1. Tungsten
  2. Copper
  3. Rubidium
  4. Aluminium
2

Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor?

  1. Potassium
  2. Calcium
  3. Magnesium
  4. Strontium
3

Which one of the following elements is needed in the human body to transfer electrical signals by nerve cells?

  1. Lithium
  2. Sodium
  3. Rubidium
  4. Caesium
4

Which one of the following is the purest form of carbon?

  1. Charcoal
  2. Coke
  3. Fullerene
  4. Carbon black
5

Dihydrogen can be prepared on a commercial scale by the action of steam on hydrocarbons, when a mixture of CO and H2 gas is formed. It is known as

  1. industrial gas
  2. producer gas
  3. fuel gas
  4. water gas
6

When carbon dioxide is passed through lime water, the solution turns milky, but, on prolonged passage, the solution turns clear. This is because

  1. the calcium carbonate formed initially is converted to soluble calcium bicarbonate on passage of more carbon dioxide
  2. the calcium bicarbonate formed initially is converted to soluble calcium carbonate on passage of more carbon dioxide
  3. the reaction is reversible and lime water is regenerated
  4. the initially formed insoluble compound is soluble in carbonic acid
7

What is the main constituent of a Pearl?

  1. Calcium carbonate and magnesium carbonate
  2. Calcium carbonate only
  3. Calcium sulphate only
  4. Calcium oxide and calcium sulphate
8

Which one of the following non-metals is present in solid state?

  1. Bromine
  2. Boron
  3. Krypton
  4. Radon
9

Which one of the following materials is not present in gun powder?

  1. Sulphur
  2. Charcoal
  3. Potassium nitrate
  4. Barium sulphate
10

Which one among the following chemicals is used as washing soda?

  1. Calcium carbonate
  2. Calcium bicarbonate
  3. Sodium carbonate
  4. Sodium bicarbonate
11

Zinc is used to protect iron from corrosion because zinc is

  1. more electropositive than iron
  2. cheaper than iron
  3. a bluish white metal
  4. a good conductor of heat and electricity
12

Which of the following statements about magnetite ore of iron is/are correct?

  1. It is known as black ore.
  2. It contains 60% to 70% of pure iron.
  3. It possesses magnetic properties.

Select the correct answer using the codes given below:

  1. 1 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3
13

Which one of the following elements is used as a timekeeper in atomic clocks?

  1. Potassium
  2. Caesium
  3. Calcium
  4. Magnesium
14

Which one of the following elements is involved in the control of water content of the blood?

  1. Potassium
  2. Lithium
  3. Rubidium
  4. Caesium
15

Which one of the following gases dissolves in water to give acidic solution?

  1. Carbon dioxide
  2. Oxygen
  3. Nitrogen
  4. Hydrogen
16

Which one of the following elements is essential for the formation of chlorophyll in green plants?

  1. Calcium
  2. Iron
  3. Magnesium
  4. Potassium
17

Why is argon gas used along with tungsten wire in an electric bulb?

  1. To increase the life of the bulb
  2. To reduce the consumption of electricity
  3. To make the emitted light colored
  4. To reduce the cost of the bulb
18

Which among the following alloys contain mercury as one of its constituents?

  1. Stainless steel
  2. Alnico
  3. Solder
  4. Zinc amalgam
19

An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following 

  1. Mg
  2. Na
  3. P
  4. Ca
20

2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be

  1. Al
  2. Au
  3. Cu
  4. Pt
21

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

  1. CuSO4
  2. CuCO3
  3. Cu(NO3)2
  4. CuO
22

Stainless steel is very useful material for our life. In stainless steel, iron is mixed with

  1. Ni and Cr
  2. Cu and Cr
  3. Ni and Cu
  4. Cu and Au
23

Galvanisation is a method of protecting iron from rusting by coating with a thin layer of

  1. Gallium
  2. Aluminium
  3. Zinc
  4. Silver
24

Silver articles become black on prolonged exposure to air. This is due to the formation of

  1. Ag3N
  2. Ag2O
  3. Ag2S
  4. Ag2S and Ag3N
25

Which of the following metals exist in their native state in nature?

  1. Cu
  2. Au
  3. Zn
  4. Ag

Select the correct option:

  1. (i) and (ii)
  2. (ii) and (iii)
  3. (ii) and (iv)
  4. (iii) and (iv)
26

Which one of the following properties is not generally exhibited by ionic compounds?

  1. Solubility in water
  2. Electrical conductivity in solid state
  3. High melting and boiling points
  4. Electrical conductivity in molten state
27

What happens when calcium is treated with water?

  1. It does not react with water
  2. It reacts violently with water
  3. It reacts less violently with water
  4. Bubbles of hydrogen gas formed stick to the surface of calcium

Select the correct option:

  1. (i) and (iv)
  2. (ii) and (iii)
  3. (i) and (ii)
  4. (iii) and (iv)
28

Which one of the following metals do not react with cold as well as hot water?

  1. Na
  2. Ca
  3. Mg
  4. Fe
29

The ability of metals to be drawn into thin wire is known as

  1. ductility
  2. malleability
  3. sonorousity
  4. conductivity
30

Which of the following reacts with cold water vigorously?

  1. carbon
  2. sodium
  3. magnesium
  4. sulphur
31

Which of the following non-metals reacts and catches fire on exposure to air?

  1. phosphorus
  2. nitrogen
  3. sulphur
  4. hydrogen
32

Which of the following is not a metal?

  1. copper
  2. sulphur
  3. aluminium
  4. iron
33

Galvanisation is a process used to prevent the rusting of which of the following?

  1. Iron
  2. Zinc
  3. Aluminium
  4. Copper