Chemical Engineering - Fertiliser Technology

26. 

Phosphatic fertilisers

A. are useful during early stage of the plant growth.
B. accelerate fruit formation in later stages of growth.
C. lessen the effect of excessive nitrogen application.
D. none of these

Answer: Option B

Explanation:

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27. 

Naphtha in a fertiliser plant is used as a source of

A. fuel
B. H2
C. N2
D. O2

Answer: Option B

Explanation:

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28. 

Pick out the wrong statement.

A. Dehydration of ammonium carbamate to produce urea is endothermic.
B. Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable.
C. Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid.
D. Phosphate rock when reacted with dilute H2SO4 produces superphosphate.

Answer: Option B

Explanation:

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29. 

Maximum nitrogen percentage is in

A. ammonium sulphate.
B. calcium ammonium nitrate.
C. urea.
D. liquid ammonia.

Answer: Option D

Explanation:

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30. 

Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.

A. 5
B. 20
C. 50
D. 65

Answer: Option B

Explanation:

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