Chemical Engineering - Fertiliser Technology

16. 

Reaction of dilute sulphuric acid with phosphate rock produces

A. phosphoric acid
B. superphosphate
C. triple superphosphate
D. gypsum

Answer: Option A

Explanation:

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17. 

Phosphoric acid is produced in wet process from phosphate rock and

A. dilute H2SO4
B. concentrated H2SO4
C. concentrated NHO3
D. concentrated HCl

Answer: Option A

Explanation:

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18. 

Base suspension fertiliser essentially contains

A. 13% N2 and 43% P2O5
B. 43% N2 and 13% P2O5
C. 43% N2 and 13% K2O
D. 43% K2O and 43% P2O5

Answer: Option A

Explanation:

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19. 

Conditioners like finely divided peat are added to the fertiliser to

A. counteract burning.
B. avoid caking & hardening.
C. produce bulk.
D. increase its solubility.

Answer: Option B

Explanation:

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20. 

Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

A. its N2 content is very low.
B. it is very costly.
C. it will evaporate on spraying.
D. it is not available.

Answer: Option C

Explanation:

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