Tag: chemistry

Questions Related to chemistry

Which of the following is not characteristic of coke?

chemistry rocks and minerals coal and its products study of coal coal

  1. Hard

  2. Porous

  3. High carbon content

  4. Soft

Show answer
Correct Option: D
Explanation:
Coke is a tough, porous and black substance. It is the purest form of carbon. Coke is used in the homes for cooking, heating and in industries, for manufacturing of steel and extraction of many metals. It is also used in thermal power plants to produce electricity.
Hence, option D is the correct option

Which derivative of coal is more viscous in nature?

chemistry rocks and minerals coal and its products study of coal coal

  1. Coke

  2. Coal tar

  3. Coal gas

  4. Graphite

Show answer
Correct Option: B
Explanation:

Coal tar is basically seen as very thick liquid used in making roads. Hence it is more viscous in nature than coal.

What is used in manufacturing of steel?

chemistry rocks and minerals coal and its products study of coal coal

  1. Coal

  2. Coal tar

  3. Coke

  4. Glass

Show answer
Correct Option: C
Explanation:

Coke is used in the manufacture of steel and extraction of many metals.

Naphthalene balls are obtained from:

chemistry rocks and minerals coal and its products study of coal coal

  1. coke

  2. plants

  3. coal tar

  4. petroleum

Show answer
Correct Option: C
Explanation:

Naphthalene is industrially prepared from coal tar. 

Which is the source of more number of industrial products?

chemistry rocks and minerals coal and its products study of coal coal

  1. Kerosene

  2. Coal tar

  3. Coke

  4. Natural gas

Show answer
Correct Option: B
Explanation:

Coal tar is used in producing industrially dyes, paints, photographic plates etc.

Which is used in extraction of metals?

chemistry rocks and minerals coal and its products study of coal coal

  1. Coal gas

  2. Coal tar

  3. Coke

  4. Petrol

Show answer
Correct Option: C
Explanation:

Coke is used in manufacturing of steel and extraction of many metal.

Which gas among the following can be used as fuel?

chemistry rocks and minerals coal and its products study of coal coal

  1. Air

  2. Nitrogen gas

  3. Coal gas

  4. Carbon dioxide gas

Show answer
Correct Option: C
Explanation:

The fuel should release the great amount of energy when combusted under specific conditions. Coal gas has high calorific value.

Which is an almost pure form of carbon?

chemistry rocks and minerals coal and its products study of coal coal

  1. Coke

  2. Coal tar

  3. Coal gas

  4. None of these

Show answer
Correct Option: A
Explanation:

Coke is a fuel with few impurities and a high carbon content, usually made from coal. It is the solid carbonaceous material derived from destructive distillation of low-ash, low-sulfur bituminous coal. Coal tar and coal gas contain more impurities than coke.

Coke is used in the preparation of:

chemistry rocks and minerals coal and its products study of coal coal

  1. $CO + {H} _{2}$

  2. $CO + {N} _{2}$

  3. graphite artificially

  4. diamond artificially

Show answer
Correct Option: A,B,C
Explanation:

Coke is used in the preparation of water gas(A), coal gas(B) and graphite but it is not used in the preparation of diamond.

Among the following, which is not the component of coal gas?

chemistry rocks and minerals coal and its products study of coal coal

  1. Methane

  2. Hydrogen

  3. Oxygen

  4. Carbon dioxide

Show answer
Correct Option: C
Explanation:

Coal gas contains calorific gases like hydrogen, methane, carbon monoxide and many hydrocarbons and non-calorific gases like nitrogen and carbon dioxide.


The composition of coal gas varied according to the type of coal and the temperature of carbonisation. Typical figures were:

hydrogen 50%
methane 35%
carbon monoxide 10%
ethylene 5%


Hence, the correct option is $\text{C}$