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

Diesel oil is preferred for heavy motor vehicles because

  1. it is cheap

  2. it causes less damage to the engine

  3. of its higher efficiency and fuel economy

  4. of its higher production from crude
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Diesel engines have a higher compression ratio than gasoline engines, which leads to greater thermal efficiency and better fuel economy, making them ideal for heavy vehicles that require significant power.

Multiple choice

Which of the following statements is/are false?

a. The various compounds present in coal tar are separated by the process of destructive distillation. b. Coal gas is an excellent fuel because all the gases present in it can burn to produce heat. c. Coke is an almost pure form of carbon as it contains 98 % carbon.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option as this statement is false. The various compounds present in coal tar are separated by the process of fractional distillation.

Multiple choice

Fossil fuels are the natural fuels that were formed from the remains of organisms buried under the earth long, long ago. The buried remains of tiny marine plants and animals were converted into which of the following fossil fuels?

a. Coal b. Petroleum c. Natural gas

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

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

This is the correct option. The buried remains of tiny marine plants and animals were converted into petroleum and natural gas.

Multiple choice

Which of the following statements is/are false?

a. The real source of energy of coal is the solar energy. b. The strong heating of coal in the absence of air is called destructive distillation. c. The useful carbon compounds present in coal gas include benzene, toluene and naphthalene.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. The useful carbon compounds present in coal tar include benzene, toluene and naphthalene.

Multiple choice

Which fuel used in rockets?

  1. Liquid carbon

  2. Liquid hydrogen

  3. Liquified petroleum gas

  4. Benzene
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Liquid hydrogen is a common high-energy rocket fuel used in space exploration because it provides a high specific impulse when burned with an oxidizer like liquid oxygen.