Question

Which of the following is/are phosphatic fertilizers?

• A. Ammonium hydrogen phosphate
• B. Phosphorous pentachloride
• C. Triphosphorus pentanitride
• D. Di-ammonium phosphate

Answer 1

Answer: (A), (D)

The correct options are
A Ammonium hydrogen phosphate
D Di-ammonium phosphate

Ammonium dihydrogen phosphate (ADP), also known as monoammonium phosphate, is formed when a solution of phosphoric acid is added to ammonia until the solution is distinctly acidic. It crystallizes in tetragonal prisms. MAP is mainly used as a fertilizer.

Diammonium phosphate is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid.DAP is used as a fertilizer. When applied as plant food, it temporarily increases the soil pH, but over a long term the treated ground becomes more acidic than before upon nitrification of the ammonium.