Chemical Engineering - Fertiliser Technology

6. 

Maximum stability of white phosphorous is at

A. very high pressure
B. atmospheric pressure
C. room temperature
D. >600°C

Answer: Option D

Explanation:

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7. 

Potassic fertilisers do not promote the development of

A. stems & leaves during early stage of plant growth.
B. starches of potatoes & grains.
C. sugar of fruits & vegetables.
D. fibrous materials of plants.

Answer: Option A

Explanation:

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8. 

The optimum size of the ammonia plant is __________ tons/day.

A. 10
B. 100
C. 1000
D. 1000C.

Answer: Option C

Explanation:

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9. 

Main component of bone ash is

A. calcium sulphate
B. calcium phosphate
C. calcium carbonate
D. sodium phosphate

Answer: Option B

Explanation:

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10. 

Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of

A. comparatively higher pressure drop.
B. high cost of the high pressure vessel used for the reactor.
C. higher pumping cost.
D. chances of entrainment and disturbance of catalyst bed.

Answer: Option B

Explanation:

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