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 coal and its products study of coal coal

________ is among the by-products when coal is carbonized to make coke.

  1. Coal tar

  2. Coal

  3. Carbon dioxide

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

Coal tar is a brown or black liquid of extremely high viscosity. Coal tar is among the by-products when coal is carbonized to make coke or gasified to make coal gas.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

______ has the highest carbon purity and is used to manufacture energy.

  1. Petrol coke

  2. Calcinated coke

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Calcinated petcoke (CPC) has highest carbon purity and is used to manufacture aluminium, graphite electrodes, steel, titanium dioxide and other carbon consuming industries.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Why is foundry coke used in boilers and furnaces?

  1. Excellent insulator

  2. Excellent source of light

  3. Excellent source of heat

  4. None of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Foundry coke is a type of hard coke which is used for the production of cast iron and ductile products. It is an excellent source of heat and therefore it is used in industrial boilers and furnaces.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

What is carbonisation of coal in production of coal tar?

  1. Heating of coal in absence of air

  2. Heating of coal in excess of air

  3. Heating of coal while adding carbon

  4. Both b and c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coal tar, a principal liquid product resulting from the carbonization of coal, i.e., the heating of coal in the absence of air, at higher temperatures.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Coal gas can be produced by:

  1. carbonization

  2. gasification

  3. both a and b

  4. none of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Coal gas can be made by two processes: carbonization or gasification. Carbonization refers to the devolatilization of an organic feedstock to yield gas and char. Gasification is the process of subjecting a feedstock to chemical reactions that produce gas.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

_____ is the material remaining after the removal of pyridine and other distillates from coal tar.

  1. Pitch

  2. Stalk

  3. Lignite

  4. None of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tar bases are the alkaline constituents of distillate oils, remaining after tar acids have been removed. One of the base that is recovered is pyridine, a colourless nitrogenous liquid that has a pungent odour and produces derivatives that are of pharmaceutical value. Pitch is the material remaining after the removal of pyridine and other distillates. It is useful in the aluminium industry for the manufacture of electrodes.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Coal gas contains:

  1. hydrogen

  2. carbon monooxide

  3. methane

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

Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities.
Coal gas contains a variety of calorific gases including hydrogen, carbon monoxide, methane and volatile hydrocarbons together with small quantities of non-calorific gases such as carbon dioxide and nitrogen.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Which type of coke is considered as pure coke?

  1. The coke which contain less quantity of carbon

  2. The coke which contain less quantity of sulphur

  3. The coke which contain less quantity of ash

  4. Both b and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The coke which contain less quantity of ash, sulfur and high quantity of carbon is called as pure coke.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Low temperature carbonisation __________.

  1. is mainly for production of smoke full coke

  2. is mainly for producing smokeless domestic coke

  3. is producing less quantity tar

  4. is meant for the production of metallurgical coke
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbonisation is the procedure in which carbon dioxide is added to the coke to make it smokeless.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Naphthalene which is used to repel moths and other insects is obtained from:

  1. Coal Tar

  2. Petroleum

  3. Coke

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

Naphthalene which is used to repel moths and other insects is obtained from coal tar.
Coal tar is a thick black liquid. It is obtained from the distillation of bituminous coal. It contains benzene, naphthalene, phenols, aniline, and many other organic chemicals.

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Coal can be used as a:

  1. purifier

  2. fuel

  3. insecticide

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

Coal is a fossil fuel that forms when dead plant matter is converted into peat, which in turn is converted into lignite, then sub-bituminous coal, after that bituminous coal, and lastly anthracite.The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel.