Tag: rocks and minerals

Questions Related to rocks and minerals

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

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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

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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

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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

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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 $\text{C}$

Petroleum is also known as Black gold?

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

  1. True

  2. False

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Correct Option: A
Explanation:

Petroleum has been nicknamed as the black gold because petroleum is very costly to extract, and black in colour.

Which coal is the generally the primary source of coke production?

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

  1. Leguminous coal

  2. Bituminous coal

  3. Black coal

  4. All of these

Show answer
Correct Option: B
Explanation:

Bituminous coal is the primary source of production of coke. It contains highest percentage of carbon.

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

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

  1. Ash

  2. Moistures

  3. Carbon

  4. All of these

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Correct Option: C
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.

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

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

  1. Sulphur

  2. Ash

  3. Nitrogen

  4. Both a and b

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Correct Option: D
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.

Coal can be used as a main source for:

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

  1. water

  2. air

  3. energy

  4. soil

Show answer
Correct Option: C
Explanation:

Coal is used as the main source of energy. Coal is burned for the production of heat and electricity.