Fertiliser Technology MCQs

Question 1

Naphtha in a fertiliser plant is used as a source of

Accepted Answer

H 2

Answer

Fuel

Answer

N 2

Answer

O 2

Question 2

__________ catalyst is used in the production of urea from CO 2 and NH 3 .

Accepted Answer

No

Answer

Vanadium pentoxide

Answer

Alumina

Answer

Nickel

Question 3

The composition of fresh feed to the high temperature, high pressure urea autoclave is

Accepted Answer

Excess liquid ammonia and compressed CO 2 gas

Answer

Excess liquid ammonia and liquefied CO 2

Answer

Liquid ammonia and excess compressed CO 2

Answer

Compressed ammonia gas and excess compressed CO 2

Question 4

Both white phosphorous as well as red phosphorous

Accepted Answer

Burns when heated in air

Answer

Are soluble in CS 2

Answer

Reacts with hot caustic soda solution to give phosphine

Answer

All of the above

Question 5

Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.

Accepted Answer

N 2

Answer

KNO 3

Answer

NO 2

Answer

NHO 3

Question 6

Low grade phosphate rock can be used in electrical furnace, because

Accepted Answer

Of the better CaO/SiO 2 balance for slag formation

Answer

CaO content is less

Answer

It is cheap

Answer

It produces low cost product

Question 7

Pick out the wrong statement.

Accepted Answer

Urea is more hygroscopic than ammonium nitrate

Answer

Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water

Answer

Apatite is the principal material present in phosphate rock which is chemically Ca 10 (PO 4 ) 6 (F, Cl, OH)

Answer

Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form

Question 8

Base suspension fertiliser essentially contains

Accepted Answer

13% N 2 and 43% P 2 O 5

Answer

43% N 2 and 13% P 2 O 5

Answer

43% N 2 and 13% K 2 O

Answer

43% K 2 O and 43% P 2 O 5

Question 9

Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N 2 & H 2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

Accepted Answer

All of the above

Answer

Stabilisation

Answer

Increasing the effectiveness

Answer

Improving the strength & heat resistance