The air pollutant not obtained by combustion is

Correct option is C

Ans. (c)
Sol. Ammonia (NH₃) is not typically produced by combustion. It is released mainly from agricultural activities, such as fertilizer application, livestock waste, and natural decay of organic matter. It is a reducing agent, not a combustion by-product.
Explanation of each option:
· (a) Carbon dioxide – ❌ Produced during the complete combustion of carbon-containing fuels.
· (b) Nitrogen dioxide – ❌ Formed during high-temperature combustion when nitrogen in the air reacts with oxygen.
· (c) Ammonia – ✅ Not a combustion product. It originates mostly from biological and agricultural sources.
· (d) Sulphur dioxide – ❌ Released during the combustion of sulfur-containing fuels like coal and oil.
Therefore, the correct answer is (c) Ammonia.