Chemical Engineering - Fertiliser Technology

11. 

Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and

A. nitric acid
B. ammonia
C. ammonium nitrate
D. nitric oxide

Answer: Option B

Explanation:

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12. 

Which of the following fertilisers is used as a cattle feed?

A. Urea
B. Calcium ammonium nitrate
C. Superphosphate
D. Ammonium sulphate

Answer: Option A

Explanation:

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13. 

Biuret formation in urea is kept at minimum (< 1 %), because it is

A. corrosive in nature.
B. toxic and harmful to some crops.
C. helpful in decomposition of urea.
D. explosive in nature.

Answer: Option B

Explanation:

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14. 

Catalyst used in desulphurisation of naphtha is

A. Co-Mo
B. Pt-Rh
C. silica gel
D. nickel

Answer: Option A

Explanation:

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15. 

Pick out the correct statement.

A. Reaction of NH3 with HNO3 to produce (NH4)2NO3 is endothermic.
B. With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and total feed rate.
C. Biuret (an intermediate during urea manufacture) is toxic to seeds and animals.
D. both (b) and (c).

Answer: Option B

Explanation:

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