Fertiliser Technology MCQs

Question 1

Flushing liquor used for cooling coke oven gas constitutes of

Accepted Answer

Ammoniacal liquor

Answer

K 2 CO 3 solution

Answer

Dilute H 2 SO 4

Answer

Dilute HCl

Question 2

Phosphoric acid is produced in wet process from phosphate rock and

Accepted Answer

Dilute H 2 SO 4

Answer

Concentrated H 2 SO 4

Answer

Concentrated NHO 3

Answer

Concentrated HCl

Question 3

A nitrogenous fertiliser contains 20% N 2 . It could be

Accepted Answer

Calcium ammonium nitrate (CAN)

Answer

Ammonium nitrate

Answer

Urea

Answer

Ammonium chloride

Question 4

Vetrocoke solution is

Accepted Answer

A mixture of K 2 CO 3 and As 2 O 3

Answer

K 2 SO 4

Answer

A mixture of Na 2 CO 3 and As 2 O 3

Answer

Na 2 SO 4

Question 5

P 2 O 5 content in superphosphate is about __________ percent.

Accepted Answer

15 - 20

Answer

30 - 35

Answer

65 - 70

Answer

85 - 90

Question 6

Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis?

Accepted Answer

Electrolysis of water

Answer

H 2 separation from coke oven gas

Answer

Steam reforming of naphtha

Answer

Cracking of natural gas

Question 7

In the manufacture of orthophosphoric acid by strong H 2 SO 4 leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

Accepted Answer

CaSO 4 .$$\frac{1}{2}$$H 2 O and CaSO 4 crystals

Answer

Pyrophosphoric acid

Answer

Metaphosphoric acid

Answer

All of the above

Question 8

Fauser Monte Catini converter is used for

Accepted Answer

Ammonia synthesis (e.g. at FCI Sindri)

Answer

Methanation of CO and CO 2

Answer

Shift conversion (i.e. CO to CO 2 )

Answer

None of these

Question 9

Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

Accepted Answer

It will evaporate on spraying

Answer

Its N₂ content is very low

Answer

It is very costly

Answer

It is not available