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 chemistry rocks and minerals carbon cycling mineral coal coal and its products

Statement: Coal tar contains large number of aliphatic hydrocarbons.


State whether the given statement is true or false.State whether the given statement is true or false.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coal tar contains a large number of aromatic hydrocarbons which in turn find applications in dyes, drugs, explosives, plastics, etc.


Hence, the given statement is $false$

Multiple choice

Which gases are released during combustion of fossil fuels?

  1. Oxygen and Carbon Dioxide

  2. Nitrogen and Oxygen

  3. Carbon Dioxide and Sulphur Dioxide

  4. Nitrous oxides and Methane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Combustion of fossil fuels releases carbon dioxide as a product of oxidation. Sulfur dioxide is also released due to sulfur impurities commonly found in coal and oil.

Multiple choice

CFCs are used in:

  1. Refrigerators

  2. Food Products

  3. Fire Extinguishers

  4. A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorofluorocarbons (CFCs) were historically used in a variety of applications, including refrigerants for refrigerators and air conditioners, as well as propellants and fire suppressants.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

Which fuel has the highest energy content per unit of mass of any chemical fuel?

  1. Petrol

  2. Hydrogen

  3. Uranium

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

Hydrogen fuel is a zero-emission fuel when burned with oxygen (if one considers water not as an emission) or used in a contained cell (allowing to react galvanically) also capable of 'reversing' the reaction if needed. It often uses electrochemical cells, or combustion in internal engines, to power vehicles and electric devices. It is also used in the propulsion of spacecraft and might potentially be mass-produced and commercialized for passenger vehicles and aircraft.

Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

Which of the following fuel additives may be used in marine engines to lower the emission of sulfur dioxide gases?

  1. Calcium

  2. Magnesium carboxylate

  3. Copper

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fuel additives such as calcium additives and magnesium carboxylate may be used in marine engines to lower the emission of sulfur dioxide gases into the atmosphere.

Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

The _________ is used in refineries to produce sulfur as a byproduct.

  1. Claus process

  2. Heating process

  3. Limestone

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

Sulfur dioxide is a major air pollutant and has significant impacts upon human health. In addition, the concentration of sulfur dioxide in the atmosphere can influence the habitat suitability for plant communities, as well as animal life. Sulfur can also be removed from fuels before burning, preventing formation of $SO _2$ when the fuel is burnt. The Claus process is used in refineries to produce sulfur as a byproduct. 

Multiple choice

Which of the following is an example of an alkane?

  1. Ethene

  2. Propene

  3. Butane

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

Alkanes are hydrocarbons with only single bonds between carbon atoms. Butane is an alkane with four carbon atoms.

Multiple choice

Which of the following is an example of a cyclic hydrocarbon?

  1. Benzene

  2. Cyclohexane

  3. Propane

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

Cyclic hydrocarbons are hydrocarbons that have a ring structure. Benzene is a six-carbon cyclic hydrocarbon with a hexagonal ring structure.

Multiple choice

Which of the following is an example of an aromatic hydrocarbon?

  1. Benzene

  2. Naphthalene

  3. Anthracene

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

Aromatic hydrocarbons are hydrocarbons that contain one or more benzene rings. Benzene is a six-carbon aromatic hydrocarbon with a hexagonal ring structure.