CNG is the short form of ________________ .

Due to ________________  pollution caused by traditional fossil fuels petrol and diesel automobiles are being replaced by CNG..

__________ is being used to run vehicles in many towns, such as Delhi, Ahmadabad and Mumbai.

Methane burns in air to form _________________ .

________________ has helped in reducing the level of pollution.

The heat produced by burning 1 gm of fuel completely is known as_____________________.

Which of the following are correct ?

(a) CNG is being used to run vehicles in many towns, such as Delhi, Ahmadabad and Mumbai.

(b) Due to heavy pollution caused by traditional fossil fuels petrol and diesel automobiles are being replaced by CNG these days as it causes less pollution problems.

Molten wax on heating releases _________________.

Water cannot be used as fire extinguisher to put out _____________________.

The liquid wax rise up the wick by the process of  _________________