Chemistry · General Awareness

Carbon and Fossil Fuels

1,756 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 geography mineral and energy resources - ii mineral resources - coal - introduction mining mineral fuels

What colour flame is seen when bituminous coal is burnt?

  1. Blue

  2. Yellow

  3. Red

  4. Green

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The yellow colour flame is seen when bituminous coal is burnt due to incandescence of very fine soot particles that are produced in the flame. This type of flame only burns at around 1,000 °C. Depending on the lighting, you may have actually seen the soot rising from the flame.

Multiple choice geography mineral and energy resources - ii mineral resources - coal - introduction mining mineral fuels

What percent of the carbon content is present in Bituminous coal?

  1. 90% to 95 %

  2. 70% to 90 %

  3. 40% to 60 %

  4. 30% to 35 %

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bituminous coal contains moisture up to approximately 17 percent. About 0.5 to 2 percent of the weight of bituminous coal is nitrogen. Its fixed carbon content ranges up to approximately 85 percent, with ash content up to 12 percent by weight.

Multiple choice geography mineral and energy resources - ii mineral resources - coal - introduction mining mineral fuels

____________ is the highest quality hard coal.

  1. Black coal

  2. Gray coal

  3. Non coal

  4. Anthracite

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter.

Multiple choice our life and environment geography

Zero emission cars will produce _____.

  1. Water as waste

  2. Carbon dioxide as waste

  3. Carbon monoxide as waste

  4. Hydrogen and oxygen as waste

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A zero-emissions vehicle, or ZEV, is a vehicle that emits no tailpipe pollutants from the onboard source of power. Harmful pollutants to the health and the environment include particulates (soot), hydrocarbons, carbon monoxide, ozone, lead, and various oxides of nitrogen. Although not considered emission pollutants by the original California Air Resources Board (CARB) or U.S. Environmental Protection Agency (EPA) definitions, the most recent common use of the term also includes volatile organic compounds, several air toxics and global pollutants such as carbon dioxide and other greenhouse gases.

Multiple choice our life and environment geography

Sometimes ________ gas leakage is seen during the course of mining.

  1. Sulphur-di-oxide

  2. Methane

  3. Carbon-di-oxide

  4. Carbon monoxide

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gas leak is a menace during mining mining, especially, methane. This happens more in coal mines, where there is abundance of carbon. An atom of carbon with hydrogen to form methane. It is suffocating and has proved fatal to miners in the past.

Multiple choice our life and environment geography

The smoke coming out of refineries during the process of purification has particles of _________.

  1. Carbon

  2. Metals

  3. Solids

  4. All of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Refinery emissions contain a complex mixture of pollutants including carbon particles, various metals, and solid particulates.

Multiple choice chemistry basic concepts of chemistry law of multiple proportion law of multiple proportions laws of chemical combination

A hybrid rocket propellant uses:

  1. a liquid oxidizer and a solid fuel

  2. a complete solid propellent

  3. a beleqiud propellent

  4. None of the above

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Hybrid propellant engines represent an intermediate group between solid and liquid propellant engines. One of the substances is solid, usually the fuel, while the other, usually the oxidizer, is liquid. 

The liquid is injected into the solid, whose fuel reservoir also serves as the combustion chamber. The main advantage of such engines is that they have high performance, similar to that of solid propellants, but the combustion can be moderated, stopped, or even restarted. It is difficult to make use of this concept for vary large thrusts, and thus, hybrid propellant engines are rarely built.

A hybrid engine burning nitrous oxide as the liquid oxidizer and HTPB rubber as the solid fuel powered the vehicle SpaceShipOne, which won the Ansari X-Prize.

Hence, the correct option is $\text{A}$