Chemistry · General Awareness

Carbon and Fossil Fuels

1,898 Questions

Review fundamental concepts regarding carbon compounds, coal distillation, and fossil fuel formation. This segment covers the chemical properties and industrial applications of natural gas and crude oil. Practicing these questions will strengthen your chemistry foundation for general science sections.

Coal distillationPetroleum formationProperties of crude oilNatural gas applications

Carbon and Fossil Fuels Questions

Multiple choice

Which of the following is not a characteristic of Liquefied Petroleum Gas?

  1. Liquefied Petroleum Gas burns easily.

  2. Liquefied Petroleum Gas does not leave any solid residue on burning.

  3. Liquefied Petroleum Gas does not produce any poisonous gases.

  4. Liquefied Petroleum Gas burns with a smokeless flame.

  5. Liquefied Petroleum Gas has a very low calorific value.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option, as LPG has a high calorific value. Due to this, while burning it produces a lot of heat.

Multiple choice

Carbolic acid is related to

  1. heavy crude oil

  2. middle oil

  3. light oil

  4. green oil

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct because a fraction of middle oil contains mainly phenol. Naphthalene crystallises out upon cooling. It is purified by sublimation and used for the manufactured of dyes, drugs, etc.

Multiple choice

Animal charcoal is obtained by

  1. destructive distillation of bones

  2. burning the slaughtered animal carcasses

  3. calcining the remains of human beings

  4. burning the bones of large animals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Animal charcoal is produced by the destructive distillation of bones in the absence of air, which leaves behind a carbon-rich residue.

Multiple choice

Sour gasoline is purified by

  1. Bergius process

  2. Fischer-Tropsch process

  3. Etard process

  4. Doctor sweetening process

  5. Dow's process
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sour gasoline is purified by the 'Doctor Sweetening' process.

Multiple choice

When coal is heated in the absence of air, it produces coke, coal tar, amino acid liquor and coal gas. What will you call this process?

  1. Destructive distillation

  2. Distillation

  3. Refining

  4. Carbonisation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The process of heating coal in the absence of air does not lead to the burning of coal, but forms many by-products. This process is called destructive distillation of coal. The main by-products of destructive distillation are: coke, coal tar, amino acid liquor and coal gas.

Multiple choice

The by-product of coal tar is used in industries in the manufacture of

  1. lubricants for machines

  2. vaseline

  3. boot polish

  4. fertilisers
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fertiliser manufacturing industries use ammoniacal liquor, which is a by-product of coal tar, which in turn is obtained during the destructive distillation of coal. All other products are manufactured with the use of petroleum constituents.