Q3 of 22 Page 143

Find the relevant pair:

a) Coal – coal gas; petroleum –


b) LPG – propane and butane; natural gas


c) Diesel – petroleum; bio diesel-

a) Petrol

Reason: It is analogy relation of natural occurring substance and its product.


b) methane


Reason: It is analogy relation of gas and its constituents.


c) wind energy


Reason: Both are same type of energy fuels.


More from this chapter

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2

Fill in the blanks:

1. The expansion of LPG is ___________.


2. LPG is stored in _____________ form in the gas cylinder.


3. The expansion of CNG is _________________.


4. The chief element in coal is _______________.


5. Natural gas contains mainly ___________________.


6. Heating in the absence of air is called _______________.


7. ______________ is the primary source of energy.


8. The coal obtained in Neyveli is _________.


9. The process of separating individual liquids, from the mixture of liquids which differ in their boiling point is called _____________.


10. ___________ is used as a reducing agent in steel manufacturing.

 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

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

 3

What do you understand by the term carbonisation?