Chemical Engineering - Fertiliser Technology

16. 

A phosphatic fertiliser contains 16% P2O5. It could be

A. dicalcium phosphate
B. superphosphate
C. triple superphosphate
D. none of these

Answer: Option B

Explanation:

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17. 

__________ is not a fertiliser.

A. Calcium ammonium nitrate
B. Ferrous sulphate
C. Liquid ammonia
D. Ammonium sulphate

Answer: Option B

Explanation:

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18. 

__________ is the undesirable by-product produced in the manufacture of urea.

A. Ammonium carbonate
B. Biuret
C. Carbon dioxide
D. Ammonium carbamate

Answer: Option B

Explanation:

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19. 

Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.

A. 250-300
B. 500-750
C. 950-1050
D. 1400-1450

Answer: Option D

Explanation:

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20. 

Which is the best fertiliser for paddy ?

A. Ammonium sulphate
B. Nitro-phosphate
C. Superphosphate
D. Potassium nitrate

Answer: Option A

Explanation:

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