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

Wood charcoal is obtained by burning wood

  1. in contact with air

  2. out of contact with air

  3. in contact with chlorine

  4. out of with carbon dioxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Wood charcoal is produced by heating wood in a limited supply or absence of air (pyrolysis), which prevents the wood from burning completely into ash.

Multiple choice

A mixture of paraffin and potassium nitrate is used as

  1. solid propellants

  2. hybrid propellant

  3. liquid propellants

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solid propellants are a mixture of solid hydrocarbon and an oxidising agent. This oxidising agent is stable at room temperature. For example, a mixture of paraffin and potassium nitrate..Paraffin is the solid hydrocarbon and KNO3 acts as the oxidising agent.

Multiple choice

Substance used for dry cleaning is _______.

  1. Petroleum

  2. Mercury

  3. Petrol

  4. Kerosene
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Petrol is commonly used as a solvent in dry cleaning processes to dissolve grease and oil stains from fabrics. It is effective because it is a non-polar solvent.

Multiple choice

Find the odd one out.

  1. Gas

  2. Petrol

  3. Coal

  4. Coal tar

  5. Electricity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All the others are forms of fuel, except coal tar.

Multiple choice

Which gas is found in coal mines?

  1. Methane

  2. Ethane

  3. Butane

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Methane gas is found in coal mines. It is found near the roof as it is lighter than air.

Multiple choice

A diesel engine has

  1. one valve

  2. two valves

  3. three valves

  4. four valves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Three valves