Tag: petroleum and natural gas

Questions Related to petroleum and natural gas

Which of the following are not obtained on fractional distillation of petroleum?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Paraffin wax

  2. Asphalt

  3. Coal gas

  4. None of these

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Correct Option: C
Explanation:

Various fractions obtained during the fractional distillation of petroleum can be categorized into two viz, Petroleum products used as fuels: Petroleum gas, petrol, kerosene, diesel, fuel oil; Petroleum product not used as fuel:- Petroleum ether, greases, petroleum jelly, paraffin wax, pitch, asphalt.

So, Coal gas is not prepared using fractional distillation.

Breaking of higher hydrocarbon into lower one by heat is called:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. neutralisation

  2. polymerisation

  3. cracking

  4. acetylating

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Correct Option: C
Explanation:

Cracking is defined as “the decomposition of high boiling hydrocarbons of high molecular weight into smaller low boiling hydrocarbons of low molecular weight”. Usually high boiling point hydrocarbons are liquids and low boiling point hydrocarbons are gases.

Which of the following is not required for the formation of coal?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Dead organisms

  2. Dead vegetation

  3. Presence of oxygen

  4. High pressure

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Correct Option: C
Explanation:

Carbonization of dead plants and animals does not happen in the presence of oxygen. This is the procedure which takes place inside the earth crust under high pressure and temperature.


 It is believed that millions of years ago, the ground below the forests was split open by natural forces such as earthquakes and volcanoes. 

The forests got buried under the surface of earth. Thus, the plants had no contact with oxygen. Successive layers of sediments sealed the buried plants. Over millions of year, these deposits were subjected to tremendous pressure and heat finally transformed them into coal.

Option C is correct.

What happens in carbonization process?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Hydrolysis

  2. Electrolysis

  3. Pyrolysis

  4. All of the above

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Correct Option: C
Explanation:

Carbonization is the term which means destructive distillation of coal which is done in the absence air in order to obtain coke and other fractions having greater percentage of carbon than the original material.


It is defined as the conversion of organic matter into carbon or the residues containing carbon through the process of pyrolysis or destructive distillation.

In the organic chemistry it is referred as the generation of coal gas or coal tar from raw coal materials.It is also applied to the pyrolysis of coal to produce coke and charcoal etc.

Option C is correct.

Coking coal is coal which on carbonisation goes through:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. softening.

  2. swelling.

  3. resolidification.

  4. All of the above.

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Correct Option: D
Explanation:

A good quality coke is generally made from carbonisation of good quality coking coals.

Coking coals are defined as coals that on carbonisation process passes through softening, swelling and resolidification of coke. 

Which of the following is used for cracking?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Vapour phase cracking

  2. Cracking in presence of hydrogen

  3. Liquid phase cracking

  4. Any of the above.

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Correct Option: D
Explanation:

Any of the following method is used for cracking
(A) Vapour phase cracking
(B) Liquid phase cracking
(C) Cracking in presence of hydrogen.

State whether the given statement is true or false.

Statement: In cracking, a less valuable lower fraction of petroleum run is converted into more valuable higher fractions by heating.
chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. True

  2. False

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Correct Option: B

Reforming (also called aromatization) is the conversion of aromatic hydrocarbons into aliphatic hydrocarbons containing the same number of carbon atoms.

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. True

  2. False

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Correct Option: B
Explanation:

Reforming (also called aromatization) is the conversion of aliphatic hydrocarbons into aromatic hydrocarbons containing the same number of carbon atoms.

Which of the following is/are true?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Gasolines with octane number of 74 are called regular gasolines

  2. Gasolines with octane number lower than 74 are called third grade gasolines

  3. Gasolines with octane number of 84 or above are called premium gasolines

  4. All of the above

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Correct Option: D
Explanation:

All of the given statements are true.
(A) Gasolines with octane number of 74 are called regular gasolines.
(B) Gasolines with octane number lower than 74 are called third grade gasolines.
(C) Gasolines with octane number of 84 or above are called premium gasolines.

Ordinary gasolines having an octane number of ____ are used in motor cars, scooter and motorcycles.

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. 74

  2. 52

  3. 26

  4. 66

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Correct Option: A
Explanation:

Ordinary gasolines having an octane number of 74 are used in motor cars, scooter and motorcycles.