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 one of the following has the highest fuel value?

  1. Hydrogen

  2. Charcoal

  3. Natural gas

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

Fuel value (calorific value) refers to the heat released per unit mass. Gasoline has a higher energy density compared to charcoal or natural gas in many practical contexts.

Multiple choice

Gun powder consists of a mixture of

  1. Sand and TNT

  2. TNT and Charcoal

  3. Nitrate, Sulphur and Charcoal

  4. Sulphur, Sand and Charcoal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Black powder, or gunpowder, is a mixture of potassium nitrate (saltpeter), sulfur, and charcoal.

Multiple choice

Which of the following are the major constituents of coal gas?

  1. Methane and ethane

  2. Hydrogen, methane and carbon monoxide

  3. Hydrogen and carbon monoxide

  4. Butane and propane
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coal gas is a flammable gaseous fuel made from coal. Its primary components are hydrogen, methane, and carbon monoxide.

Multiple choice

Which of the following statements is/are false? a. When charcoal burns with the oxygen in the air, a lot of heat, but only a little light is produced. b. Carbon dioxide is necessary for combustion to take place. c. Respiration is a kind of slow combustion of food which takes place to produce heat in the body.

  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
C Correct answer
Explanation

This is a wrong option. Statement 'b'  is a false statement. Oxygen is necessary for combustion to take place.

Multiple choice

Which of the following statements is/are false? a. A combustible substance cannot catch fire as long as its temperature is higher than its ignition temperature. b. A supporter of combustion is necessary for the combustion to take place. c. The lowest temperature at which a substance catches fire and starts burning is called its ignition temperature.

  1. Only c

  2. Only a and b

  3. Only b

  4. Only b and c

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

It is the correct option. Statement 'a' is false. A combustible substance cannot catch fire as long as its temperature is lower than its ignition temperature.

Multiple choice

Which of the following is an example of explosive combustion?

  1. Burning of LPG in a gas stove.

  2. Burning of white phosphorus.

  3. Burning of wax in a candle.

  4. Burning of coal dust in coal mines.

  5. Burning of firecrackers during festivals.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option. Burning of firecrackers during festivals is an example of explosive combustion.

Multiple choice

Which of the following statements is/are false? a. Dry leaves catch fire easily, but green leaves do not. b. Coal fires cannot be started easily using a matchstick as coal has a high ignition temperature. c. The ignition temperature of wood is lower than that of kerosene.

  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

 It is the correct option. Statement 'c' is a false statement. The ignition temperature of kerosene is lower than that of wood.