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 physics sources of energy biomass and biogas biogas conventional sources of energy

Biomass can be defined or described as:

  1. petroleum

  2. organic matter which can be converted to fuel

  3. inorganic matter which can be converted to fuel

  4. massive living things
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biomass is organic matter that can be used as energy source, made up of wood, crops and animal waste. It is renewable source of energy.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

Fuel obtained from biomass are:

  1. Charcoal (from wood).

  2. Bio-gas from animal waste (cow-dung etc).

  3. Bio-diesel (from sugar cane and oilseed crops).

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

Biomass is a organic fuel.Charcoal is obtained from burning of the wood. Biogas is obtained from organic wastes such as animal excreta, agricultural waste etc, Bio-diesel can be obtained from oil seed crops such as Jatropa.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Commonly candles are prepared from

  1. Bee's wax

  2. Paraffin wax

  3. Stearic acid

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

Commonly candles are prepared from stearic acid and paraffin wax. Candles that made from paraffin wax only burn quicker than those made from paraffin wax and stearic acid together.

Thus, the correct answer is option D.

Multiple choice biology water and air and their importance water management - case studies introduction to natural resources management of natural resources

The amount of oil that may become available for use is called oil

  1. Reserves

  2. Reservoirs

  3. Resources

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

In the context of oil and gas, resources refer to the total estimated amount of oil that exists, while reserves refer specifically to the portion that is technically and economically recoverable.

Multiple choice components and importance of food science of kitchen evs

Biogas can be a good substitute for

  1. Fuelwood

  2. Petroleum and oil

  3. Coal

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

In many areas, biogas can be used as a replacement for fuels like firewood and dried dung for their energy consumption. Replacing firewood with biogas would have a positive effect on deforestation. That would improve  the local environments, ecosystems, problems with erosion etc. Hence option A is correct.

Multiple choice chemistry changes around us crystallisation process of separating components of a mixture physical changes

Which of the following is not a chemical change?

  1. Whipping eggs

  2. Burning wood

  3. Digestion

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

In whipping of eggs, the air is introduced into the fluid but no new substance is formed. Hence, it is a physical change. Digestion and burning of wood results in the formation of new substances. Thus, it is a physical change.


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

Multiple choice evs garbage in, garbage out preparation of compost sewage disposal solid waste management

Pyrolysis of wood yields

  1. Alcohol

  2. Charcoal

  3. Charcoal and wood gas

  4. Charcoal, wood gas, tar and oil
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Pyrolysis is the thermal composition of a material by heating it at a very high temperature. Pyrolysis of wood occurs at a temperature of  200–300 °C. Many products are formed from pyrolysis of wood like charcoal, tar, wood gas and wood oil. Charcoal is the residue left after burning of wood. It is rich in carbon. Wood gas and wood oil are used as fuels. Tar is a black liquid and used as filler in roads.
So, the correct answer is 'Charcoal, wood gas, tar and oil'.