Chemical Engineering - Fertiliser Technology

16. 

Heating of orthophosphoric acid to about 900°C, produces

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

Answer: Option A

Explanation:

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17. 

Reaction of phosphate rock with 98% H2SO4 produces

A. orthophosphoric acid
B. superphosphate
C. white phosphorous
D. none of these

Answer: Option A

Explanation:

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18. 

HPO3 is the chemical formula of __________ phosphoric acid.

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

Answer: Option C

Explanation:

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19. 

Both white phosphorous as well as red phosphorous

A. are soluble in CS2.
B. burns when heated in air.
C. reacts with hot caustic soda solution to give phosphine.
D. all (a), (b), and (c).

Answer: Option B

Explanation:

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20. 

Catalyst used in steam reforming of naphtha is

A. nickel
B. platinum
C. silica gel
D. rhodium

Answer: Option A

Explanation:

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