Question

A gas which is use for cooking at our home is______
A) Oxygen
B) Nitrogen
C) L.P.G.( liquefied petroleum gas)
D) C.N.G. (compressed natural gas)

Answer 1

Hint: There are various gases available in nature. The choice of gas used for cooking depends on its flammability, calorific value, ignition power etc.

Complete answer:
We can use only flammable gases for cooking. A gas that burns in the presence of an oxidant when provided with a source of ignition is known as a flammable gas.

>Oxygen cannot be used for cooking at our home as it is non-flammable gas. Thus, option (A) oxygen is incorrect.
>Similarly, nitrogen is also non-flammable gas so cannot be used for cooking at our home. Thus, option (B) nitrogen is incorrect.
>L.P.G. and C.N.G. are both flammable gases however, we use L.P.G.( liquefied petroleum gas) for cooking due to the following reasons:
i) L.P.G. is more flammable than the C.N.G.
ii) L.P.G. has a higher calorific value than the C.N.G.

Additional information:
The most popular gas which we use for cooking is L.P.G.( liquefied petroleum gas). It is a mixture of hydrocarbons propane and butane. L.P.G. has the following properties.

i) It is a colorless, odorless, non-toxic gas.
ii) It can be liquefied at moderate pressure.
iii) It undergoes complete combustion.
iv) It has excellent heating capacity.
v) It is economical.
vi) It is highly flammable.
vii) It is heavier than air so easy to accumulate in low lying areas.

Thus, the correct option is (C) L.P.G.( liquefied petroleum gas)

Note:The gas that is used at home must be safe to use. It should be easily available and economical. It should not produce any toxic gases. It must have a high calorific value.