Chemical Engineering - Fertiliser Technology

31. 

Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

A. has a pungent smell.
B. vaporises at normal temperature.
C. is toxic and highly corrosive.
D. is in short supply.

Answer: Option B

Explanation:

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32. 

Rock phosphate used for the production of phosphatic fertiliser is mined at

A. Amjhor (Jharkhand)
B. Talchar (Orissa)
C. Bailladella (M.P.)
D. Kiriburu (Bihar)

Answer: Option A

Explanation:

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33. 

CaH4(PO4)2 is the chemical formula of

A. superphosphate
B. triple superphosphate
C. calcium phosphate
D. meta phosphoric acid

Answer: Option B

Explanation:

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34. 

Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

A. mixed
B. complex
C. highly hygroscopic
D. highly explosive

Answer: Option B

Explanation:

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35. 

Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

A. presence of an inert atmosphere.
B. presence of a reducing atmosphere.
C. absence of air.
D. presence of an oxidising atmosphere.

Answer: Option C

Explanation:

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