Question

The poisonous gas that comes out with petrol burning in a car is

Answer 1

Car exhaust releases many harmful gases such as hydrocarbons, nitrogen oxides, sulphur dioxide, etc.

The most poisonous gas is carbon monoxide. Carbon monoxide is a colourless and odourless gas. Once entered in lungs, it enters haemoglobin and reduces space for oxygen, thus reducing one's breathing capacity.

Hence, it is a very poisonous gas that comes out with petrol burning in a car.