- (A) Ammonia
- (B) Urea
- (C) Superphosphate
- (D) Triple superphosphate
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- (A) Meta-phosphoric acid
- (B) Pyrophosphoric acid
- (C) No change in it
- (D) None of these
- (A) Increase its nitrogen content
- (B) Cut down its production cost
- (C) Avoid the risk of explosion
- (D) Add extra nutrient as fertiliser
- (A) Calcium sulphate
- (B) Calcium phosphate
- (C) Calcium carbonate
- (D) Sodium phosphate
- (A) Isopropyl alcohol
- (B) Butyl alcohol
- (C) Toluene
- (D) Hexane
- (A) Ortho-phosphoric acid
- (B) Simple superphosphate
- (C) Triple superphosphate
- (D) Red phosphorous
- (A) Hydrogenated
- (B) Liquefied
- (C) Gasified
- (D) Dehydrogenated
- (A) Ammonium phosphate
- (B) Flour apatite
- (C) Calcium fluoride
- (D) Calcium phosphate
- (A) Natural gas as a source of hydrogen
- (B) Natural gas as heating medium
- (C) Coal gas as a source of hydrogen
- (D) Coal gas as heating medium
- (A) H3PO4
- (B) H4P2O7
- (C) HPO3
- (D) Same as that of Pyrophosphoric acid
