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 petroleum properties of alkanes petroleum and natural gas

LPG is ___________ .

  1. Liquefied petroleum gas

  2. Low petroleum gas

  3. Liquid pressure gas

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

Liquefied petroleum gas or it is also called liquid petroleum gas abbreviated as LPG. 

Also referred to as propane or butane, are flammable mixtures of hydrocarbon gases used as fuel in heating appliances and cooking equipment.

Hence, option A is correct.

Multiple choice chemistry rocks and minerals petroleum properties of alkanes petroleum and natural gas

Coal and petroleum are called fossil fuels.

State whether the statement is True or False

  1. The statement is True

  2. The statement is False

  3. Neither

  4. Coal and petroleum are called natural fuels.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coal and petroleum are called fossil fuels. They serve as source of energy as on combustion, they release heat energy.

Multiple choice chemistry rocks and minerals petroleum properties of alkanes petroleum and natural gas

The main constituent of LPG is:

  1. methane

  2. butane

  3. propane

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

LPG constitutes both propane and butane in equal percentages.
Liquefied Petroleum Gas or LPG (also called Autogas) consists mainly of propane, propylene, butane, and butylene in various mixtures. It is produced as a by-product of natural gas processing and petroleum refining. The components of LPG are gases at normal temperatures and pressures.

Multiple choice chemistry fossil fuels petroleum properties of alkanes rocks and minerals

LPG used as domestic fuel is mixed with a strong smelling volatile liquid for __________.

  1. better combustion

  2. good smell/fragrance

  3. detection of gas leakage

  4. higher calorific value
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If the gas leaks in air, it can be easily detected due to smell and preventive measures can be taken. Hence, LPG is mixed with a strong smelling volatile liquid.

Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

When combustion of coal takes place in insufficient air (oxygen) which gas is formed . Instead of carbon dioxide

  1. Sulphur dioxide

  2. Nitrous oxide

  3. Carbon monoxide

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

Fuels burn when they react with oxygen in the air. If there is plenty of air, complete combustion happens.  Coal is mostly carbon. During complete combustion, carbon is oxidized to carbon dioxide:
carbon + oxygen -- carbon dioxide
If there is insufficient air for complete combustion, incomplete combustion (also called partial combustion)  happens. Hydrogen is still oxidized to water, but carbon monoxide forms instead of carbon dioxide.

So, the correct answer is 'Carbon monoxide'.

Multiple choice evs - i rules are for everyone sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles unequal distribution of resources protecting our environment meaning and type of resources

Source of energy which does not evolve CO$ _{2}$ is

  1. Coal

  2. Oil

  3. Organic compounds

  4. Nuclear energy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coal and oil are fossil fuels been derived from dead bodies of plants and animals, which existed in past. Hence, they are carbon compounds and emit carbon dioxide on combustion. Organic compounds are obviously compounds of carbon and will evolve carbon dioxide on combustion. Nuclear energy is non conventional, non renewable resource. Nuclear fission (now fusion also) of selected radioactive materials yields large amount of heat energy. For example one amu of Uranium - 235 yields energy equal to burning of 15 metric tonnes of coal. The energy released in nuclear fission and fusion is not due to combustion process and hence, does not evolves carbon dioxide.