Which of the following is emitted in least amount when coal is burnt?

Correct option is B

Explanation:
When coal is burnt, the primary emissions include:
· Carbon dioxide (CO₂): Formed due to combustion of carbon in coal.
· Sulphur dioxide (SO₂): Produced from sulfur content in coal.
· Nitrogen oxides (NOₓ): Formed due to high-temperature combustion.
Ammonia (NH₃), on the other hand, is not a significant by-product of coal combustion and is released in negligible amounts, if at all. It is not naturally present in large amounts in coal and is typically associated with biological or agricultural processes, not fossil fuel combustion.
Information Booster:
· SO₂ emissions lead to acid rain.
· NOₓ contributes to smog and respiratory problems.
· CO₂ is a major greenhouse gas.
· NH₃ emissions mostly come from agriculture, fertilizers, and animal waste, not fossil fuels.
Additional Information:
· Option (a) SO₂: Released due to sulfur in coal.
· Option (c) CO₂: Main product of combustion.
· Option (d) NOₓ: Produced at high combustion temperatures.