a) Basic Calcium Nitrate
b) Urea
c) Calcium Ammonium Nitrate
d) Ammonium Sulphate
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Answer: is d) Ammonium Sulphate
Ammonium Sulphate is prepared by treating ammonia gas with dilute sulphuric acid.
The process involves combining anhydrous ammonia with sulfuric acid, creating a mixture of ammonia gas and water vapor. The ammonia then reacts with water in the soil, changing to the ammonium form. Ammonium sulfate is used as a fertilizer, as a freezing mixture, in safety explosives, matches, and pyrotechnics.