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 statements is incorrect?

  1. Anthracite has a carbon content of over 87% on a dry ash-free basis.

  2. Substances obtained from coal are termed as ‘Petrochemicals’.

  3. Bitumen has a carbon content of between 77% and 87% on a dry ash-free basis.

  4. Petroleum gas in form of liquid is used as fuel for home and industry.

  5. In India, oil is found in Assam, Gujarat, Mumbai High and in the river basins of Godavari and Krishna.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Petrochemicals are substances obtained from petroleum. 

Multiple choice

Petroleum is formed from

  1. domestic animals

  2. organisms in sea

  3. wild animals

  4. insects

  5. birds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Crude oil or petroleum is found deposited under the sea. It is fossil fuel.  As these organisms died, their bodies settled at the bottom of the sea and got covered with layers of sand and clay. Over millions of years, absence of air, high temperature and high pressure transformed the dead organisms into petroleum and natural gas.

Multiple choice

Petroleum is mainly a mixture of

  1. carbohydrates

  2. carbogens

  3. hydrocarbons

  4. alcohols

  5. carbohydrates and hydrocarbon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Petroleum is a mixture of hydrocarbon with  hetro-atom such as oxygen , nitrogen , sulphur, etc. 

Multiple choice

Petroleum is a mixture of

  1. petrol

  2. diesel

  3. petroleum gas

  4. lubricant oil

  5. all of the above

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Petroleum gas, petrol, diesel and lubricating oil are products of petroleum.

Multiple choice

Which of the following is a petrochemical?

  1. Ammonia

  2. Coke

  3. Coal tar<o:p></o:p>

  4. Acetone

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

Paraffin wax is a heavy hydrocarbon that is extracted from crude oil (petrochemical).  Paraffin waxes are produced by refining or separating the waxes out of crude mineral oils.

Multiple choice

Products obtained by the process of destructive distillation are

  1. petrol, diesel, kerosene

  2. coke, coal tar, coal gas

  3. paraffin wax, bitumen

  4. compressed natural gas

  5. all of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In destructive distillation, coal is heated strongly in absence of air. It changes and forms coke. The gas released in the process is passed through water. On doing this, some of the compounds get condensed and settle down at the bottom of container and coal tar is obtained.

Multiple choice

Why are coal and petroleum exhaustible substances?

  1. They take millions of years for their formation.

  2. Their availability is limited to a particular site.

  3. There is an unavailability of alternate resources.

  4. There is limited biomass for their formation.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coal and petroleum take millions of years to form. Due to this reason, they are exhaustible substances.