D. Answer the following questions in brief.
1. Define the term "fuel".
2. Name any two renewable natural sources of energy
3 Define the term carbonisation.
Same the three main products obtained from destructive distillation of coal
5. State two uses each of the following:
(2) asphalt (b) paraffin wax
6. Write the full forms of CNG, LPG and PNG.
Answers
Explanation:
FUEL= A substance that produces useful energy when it undergoes a chemical or nuclear reaction. Fuel such as coal, wood, oil, or gas provides energy when burned.
(2) fresh water , solar energy
(3) Carbonization is the conversion of organic matters like plants and dead animal remains into carbon
(4) coal gas, coke and carbon gas
(5) ASPHALT= it is used in road construction
surface working on airfields
PARAFFIN WAX= used in skin-softening salon and spa treatment
dyed paraffin wax can be made into crayons.
(6) CNG= compressed natural gas
LPG= liquefied petroleum gas
PNG= piped natural gas
1 . A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work.
2 . Some examples of renewable energy sources are solar energy, wind energy.
3 . Carbonisation is the term for the conversion of an organic substance into carbon or a carbon-containing residue through pyrolysis or destructive distillation.
4 . Coke, coal gas, gas carbon, coal tar,ammonia liquor, and "coal oil" are examples of commercial products historically produced by the destructive distillation of coal.
5 . (a) The primary use of asphalt is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete.
(b) paraffin is used in skin-softening salon and spa treatments on the hands, cuticles, and feet because it's colorless, tasteless, and odorless.
6 . Compressed natural gas (CNG)
Liquefied petroleum gas (LPG)
Piped natural gas (PNG)