Which element is essential for burning of fuel?
Oxygen
Nitrogen
Carbon dioxide
Sulphur dioxide
Oxygen gas is essential for combustion and burning of fuel requires oxygen for the flame to sustain.
The constituent of polluted air which contributes in producing acid rain is:
(a) nitrogen
(b) sulphur dioxide
(c) oxygen
(d) argon
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