Tag: rocks and minerals

Quizzes (5) Questions (347)

Questions Related to rocks and minerals

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 $\text{C}$

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

Which of the following constituents of coal is the most important in production of coke?

  1. Ash

  2. Moistures

  3. Carbon

  4. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Coal is the measurable exhaustible natural fuel. It is processed in the industry to get products like coke. Carbon is the measurable constituent of coke which is required in the production of coke.

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

On which of the following content of coke, its price depend?

  1. Sulphur

  2. Ash

  3. Nitrogen

  4. Both a and b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Price of the coke depends upon the coal which is used for the production of coke. Because the concentration of sulphur and ash vary in cokes, this is the main content of the coke on which its price depends.