Question

give reason
CNG called a gas

Answer 1

This escaping of vapour causes the pressure drop in the cylinder and more liquid will become vapour. Thus we actually vaporise the contents of the cylinder and use only the gaseous form of LPG for our heating purposes. Hence it is commonly called gas.

Answer 2

CNG is a fuel that can be used as substitute for other fuels like diesel and petrol
Compressed Natural Gas is burnt the quantity of co2 that is burnt ½ of what is emitted.
When coal and other fossils are burnt other pollutants like sulphur oxide, NO2 also emitted in lesser quantity
thus, the atmosphere is relatively cleaner
When CNG is used ...