Q3 of 22 Page 143

Read the following tabular column carefully and decide which fuel we should use for cooking.

i. LPG gas is more preferable, because it is safe for human life and environment.


ii. LPG is clean fuel as no smoke is produced.


iii. LPG gas is more beneficial because is catches fire easily and takes less time.


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3

Ram’s family cooks food quickly as they use LPG gas. Murugan family takes a longer time to cook food. What could be the reason?

 3

Find the relevant pair:

a) Coal – coal gas; petroleum –


b) LPG – propane and butane; natural gas


c) Diesel – petroleum; bio diesel-

 3

What do you understand by the term carbonisation?

 3

Point out difference between coal and coke.