Tag: rocks and minerals

Questions Related to rocks and minerals

Which is the best quality coal?

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. Lignite

  2. Bituminous

  3. Anthracite

  4. Peat

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Correct Option: C
Explanation:

Anthracite is the best quality of coal.

Which country tops in coal production?

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. India

  2. America

  3. China

  4. England

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Correct Option: C
Explanation:

China tops in the production of coal.

What is the percentage of free carbon in lignite?

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. 20

  2. 40

  3. 60

  4. 80

Show answer
Correct Option: B
Explanation:

The percentage of free carbon in lignite is 40%.

Coal gas mainly consists of high molecular mass aromatic hydrocarbons.

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. True

  2. False

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Correct Option: B
Explanation:

Coal gas mainly consists of low molecular mass alkanes and alkenes. It is used as a fuel.

What is the percentage of free carbon in peat?

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. 10-15

  2. 25-35

  3. 50-55

  4. 75-80

Show answer
Correct Option: A
Explanation:

The percentage of free carbon in peat is 10-15%.

What is the percentage of free carbon in bituminous coal?

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. 30

  2. 50

  3. 70

  4. 90

Show answer
Correct Option: C
Explanation:

The percentage of free carbon in bituminous coal is 70%.

What is the percentage of free carbon in anthracite?

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. 30

  2. 60

  3. 90

  4. 95

Show answer
Correct Option: C
Explanation:

The percentage of free carbon in anthracite is 90%. It is the coal of high grade.

Coal is free carbon.

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. True

  2. False

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Correct Option: B
Explanation:

Coal is not merely free carbon but it is a complex mixture of several organic compounds with varying amounts of free carbon, depending upon the type of coal.

Statement: Coal tar contains large number of aliphatic hydrocarbons.


State whether the given statement is true or false.State whether the given statement is true or false.

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. True

  2. False

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Correct Option: B
Explanation:

Coal tar contains a large number of aromatic hydrocarbons which in turn find applications in dyes, drugs, explosives, plastics, etc.


Hence, the given statement is $false$

Carbonisation of coal is done to meet the demand coke and coal tar.

chemistry rocks and minerals carbon cycling mineral coal coal and its products

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Carbonisation of coal is done to meet the demand coke (required by steel industry as fuel) and coal tar (a rich source of aromatic compounds).