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 study of the first element - hydrogen occurrence of hydrogen introduction to hydrogen hydrogen

The process of producing syngas from coal is called ______________.

  1. coal cracking

  2. coal gasification

  3. coal pyrolysis
  4. both $A$ and $B$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coal gasification is the process of producing syngas–a mixture consisting primarily of methane ($C{ H } _{ 4 }$), carbon monoxide (CO), hydrogen (${ H } _{ 2 }$), carbon dioxide ($C{ O } _{ 2 }$) and water vapor (${ H } _{ 2 }O$)–from coal and water, air and/or oxygen.

Multiple choice chemistry chemical reactions of organic compounds uses of alcohols commercially important alcohols - ethanol some commercially important alcohols commercially important alcohols - methanol methanol

Ethanol burns to produce carbon dioxide and water and can be used as :

  1. gas

  2. fuel

  3. antioxidant

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

Ethanol burns to produce carbon dioxide and water and can be used as a fuel on its own or in mixtures with petrol (gasoline). "Gasohol" is a petrol/ethanol mixture containing approximately $10\%$-$20\%$ ethanol.

Multiple choice evs what if it finishes? lpg, cng treasures from the earth fuel and conservation

Kerosene has a lower ignition temperature than diesel.

  1. True

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

A fuel with lowest ignition temperature means, it catches fire easily and is called highly inflammable. Kerosene has lower ignition temperature than diesel. This means kerosene will start to catch fire faster than diesel.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

The characteristics of a good fuel are:

  1. it should release more energy

  2. it should be safe

  3. it should be easily transportable

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The characteristics of a good fuel are near to the characteristics of an ideal fuel, as there can not exist an ideal fuel in nature.
It should release more energy,  it should be safe,  it should be easily transported, readily available,  should not cause pollution on combustion etc.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Spark plugs are not necessary in a diesel engine because 

  1. compression of the gases heat them above the ignition temperature of the fuel

  2. diesel is more volatile than petrol

  3. there is deposition of carbon in the spark plug which is difficult to remove

  4. diesel is easily ignited
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

What is the full form of PNG?

  1. Petrol Natural Gas

  2. Piped Natural Gas

  3. Pressurise Natural Gas

  4. Pure Natural Gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Piped Natural Gas is abbreviated as PNG. Piped Natural gas (PNG) is used for domestic, commercial and industrial consumption. PNG has several distinctions to its credit of being a pollution free fuel, economical and safer fuel.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Cleaner fuel among the following is:

  1. petrol

  2. kerosene

  3. diesel

  4. compressed natural gas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Compressed natural gas is a cleaner fuel because it causes less pollution by emitting lesser pollutants like carbon dioxide, nitrogen oxides, sulphur oxides, carbon monoxides, unburnt hydrocarbons etc.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Secondary fuel among the following is:

  1. methanol

  2. water gas

  3. LPG

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The artificial fuel which is made of chemical conversions or the fuel which we get by processing the primary fuel is called secondary fuel. Methane, water gas and LPG are secondary fuel.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Paraffin wax is a solid product obtained from petroleum. Some of its uses are mentioned here. Mark the wrong one?

  1. In greases for axles of motor vehicles

  2. As a coating on paper

  3. In the making of candles

  4. As a stiffening agent in cosmetic creams
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fractional distillation of petroleum yields paraffin wax which is generally used to treat conditions like arthritis and fibromyalgia, as a coating on paper, in making candles; as a stiffening agent. 

It is not used as grease.