Which gas in air is essential for respiration in humans?

Q. Which poisonous gas is formed as a result of incomplete combustion?
(a) coal gas
(b) carbon monoxide
(c) carbon dioxide
(d) nitrogen oxide

Q.

Which of the following gas does not contribute to the formation of acid rain ?

(a) nitrogen monoxide

(b) carbon monoxide

(c) sulphur dioxide

(d) nitrogen dioxide

Q.

Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent?

(a) carbon dioxide

(b) nitrogen monoxide

(c) carbon monoxide

(d) sulphur dioxide

Q.

Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?

Q.

Incomplete burning of fuel produces __ (Carbon dioxide/Carbon monoxide) which is a Poisonous gas.