Fertiliser Technology MCQs

Question 1

Superphosphate is manufactured by reacting phosphate rock with

Accepted Answer

Sulphuric acid

Answer

Acetic acid

Answer

Aluminium chloride

Answer

None of these

Question 2

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

Accepted Answer

Complex

Answer

Mixed

Answer

Highly hygroscopic

Answer

Highly explosive

Question 3

Phosphorus vapour comprises of

Accepted Answer

P 4

Answer

P

Answer

P 2

Answer

P 3

Question 4

Pick out the correct statement.

Accepted Answer

With increase in NH 3 /CO 2 ratio, urea yield decreases for a given temperature, pressure and total feed rate

Answer

Reaction of NH 3 with HNO 3 to produce (NH 4 ) 2 NO 3 is endothermic

Answer

Biuret (an intermediate during urea manufacture) is toxic to seeds and animals

Answer

Both B and C

Question 5

Nitric acid is produced on commercial scale in a fertiliser plant by

Accepted Answer

Oxidation of ammonia

Answer

CaNO 3 + H 2 SO 4 reaction

Answer

Passing air through high voltage electric arc

Answer

None of these

Question 6

An increase in the NH 3 /CO 2 ratio in urea manufacture results in

Accepted Answer

Increased degree of conversion of CO 2 to urea

Answer

Decreased degree of conversion of NH 3 to urea

Answer

Decreased yield of urea

Answer

Decreased specific volume of molten mass

Question 7

Formation of ammonium carbamate by reaction of NH 3 with CO 2 is a/an __________ reaction.

Accepted Answer

Exothermic

Answer

Catalytic

Answer

Endothermic

Answer

Reversible

Question 8

H 4 P 2 O 7 is the chemical formula of __________ phosphoric acid.

Accepted Answer

Pyro

Answer

Ortho

Answer