Questions Related to coal

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

Which is an almost pure form of carbon?

  1. Coke

  2. Coal tar

  3. Coal gas

  4. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Coke is used in the preparation of:

  1. $CO + {H} _{2}$
  2. $CO + {N} _{2}$
  3. graphite artificially

  4. diamond artificially

Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
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.

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

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

  1. Methane

  2. Hydrogen

  3. Oxygen

  4. Carbon dioxide

Reveal answer Fill a bubble to check yourself
C Correct answer
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 $\text{C}$