Question

D. Answer the following questions in brief,
1. Define the term 'fuel'.
2.
Name any two renewable natural sources of energy
Define the term 'carbonisation'.
Name the three main products obtained from destructive distillation of co
5.
State two uses each of the following
(a) asphalt (b) paraffin wax
6.
Write the full forms of CNG, LPG and PNG​

Answer 1

1) 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)Wind Energy & Solar energy.

3)Carbonisation is the conversion of organic matters like plants and dead animal remains into carbon through destructive distillation.

4) Coke, Coal tar & Coal gas.

5) a) Road construction & Roof sealing.

b) Skin softening & Pain relief.

6) CNG = Compressed natural gas.

LPG = Liquefied petroleum gas.

PNG = Piped Natural Gas.