Chemical Engineering - Fertiliser Technology

36. 

P2O5 content in triple superphosphate is about __________ percent.

A. 42-50
B. 15-20
C. 85-90
D. 70-75

Answer: Option A

Explanation:

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37. 

H3PO4 is the chemical formula of __________ phosphoric acid.

A. pyro
B. ortho
C. meta
D. none of these

Answer: Option B

Explanation:

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38. 

Heating of orthophosphoric acid to 250°C produces

A. metaphosphoric acid
B. pyrophosphoric acid
C. no change in it
D. none of these

Answer: Option B

Explanation:

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39. 

Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.

A. Haber's
B. Stengel
C. Le-chatlier's
D. Du-pont's

Answer: Option B

Explanation:

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40. 

Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

A. stabilisation
B. increasing the effectiveness
C. improving the strength & heat resistance
D. all a, b & c

Answer: Option D

Explanation:

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