Fertiliser Technology

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

  1. Vanadium pentoxide
  2. No
  3. Alumina
  4. Nickel
Correct answer: (B)
No

12._________ is not a fertiliser.

  1. Calcium ammonium nitrate
  2. Ferrous sulphate
  3. Liquid ammonia
  4. Ammonium sulphate
Correct answer: (B)
Ferrous sulphate

13._________ is required more for leafy crops.

  1. Nitrogen
  2. Phosphorous
  3. Potassium
  4. Carbon
Correct answer: (A)
Nitrogen

14._________ is the most suitable fertiliser for paddy.

  1. Urea
  2. Ammonium sulphate
  3. Superphosphate
  4. Potassium nitrate
Correct answer: (B)
Ammonium sulphate

15._________ is the undesirable by-product produced in the manufacture of urea.

  1. Ammonium carbonate
  2. Biuret
  3. Carbon dioxide
  4. Ammonium carbamate
Correct answer: (B)
Biuret

16.(CH3 C6 H4)3 PO4 is the chemical formula of

  1. Triple superphosphate
  2. Tricresyl phosphate
  3. Fluorapatite
  4. Superphosphate
Correct answer: (B)
Tricresyl phosphate

17.5-10-5 fertilisers mean that they contain

  1. 5, 10, 5% respectively of N2, P2O5 and K2O
  2. Only 5 to 10% active fertiliser constituents
  3. 5 to 10% filler&carrier of soil conditioners
  4. None of these
Correct answer: (A)

5, 10, 5% respectively of N2, P2O5 and K2O

18.A fertiliser contains 82% N2. It could be

  1. Urea
  2. Liquid NH3
  3. Ammonium nitrate
  4. None of these
Correct answer: (B)

Liquid NH3

19.A fertiliser plant is classified as a gas based fertiliser plant, when it uses _________ gas as a source of hydrogen for the manufacture of ammonia.

  1. Coke oven
  2. Producer
  3. Natural
  4. Coal
Correct answer: (C)
Natural

20.A mixture of phosphate rock _________ is heated in an electric furnace to produce phosphorous.

  1. Salt&coke
  2. Sand&coke
  3. And coke
  4. And sand
Correct answer: (B)
Sand&coke
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