Fertiliser Technology MCQs

Question 1

Heating of orthophosphoric acid to 250°C produces

Accepted Answer

Pyrophosphoric acid

Answer

Metaphosphoric acid

Answer

No change in it

Answer

None of these

Question 2

__________ is the most suitable fertiliser for paddy.

Accepted Answer

Ammonium sulphate

Answer

Urea

Answer

Superphosphate

Answer

Potassium nitrate

Question 3

Ammonium phosphate is a __________ fertiliser.

Accepted Answer

Mixed

Answer

Nitrogenous

Answer

Phosphatic

Answer

Complex

Question 4

Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

Accepted Answer

Osmotic pressure of the soil water becomes higher than that of the plant sap

Answer

Osmotic pressure of the soil water becomes less than that of the plant sap

Answer

Soil becomes too alkaline

Answer

Soil becomes too acidic

Question 5

Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?

Accepted Answer

Tar

Answer

Water

Answer

Naphtha

Answer

Coal/coke oven gas

Question 6

__________ catalyst is used in the production of urea from CO2 and NH3.

Accepted Answer

No

Answer

Vanadium pentoxide

Answer

Alumina

Answer

Nickel

Question 7

Nitrolime is chemically known as

Accepted Answer

Calcium ammonium nitrate (CAN)

Answer

Calcium nitrate

Answer

Ammonium nitrate

Answer

None of these

Question 8

Which is the most suitable fertiliser for paddy?

Accepted Answer

Ammonium sulphate

Answer

CAN

Answer

Ammonium nitrate

Answer

Superphosphate

Question 9

Urea is formed only

Accepted Answer

In liquid phase

Answer

In vapour phase

Answer

At very high temperature

Answer

At very low pressure (vacuum)