41. Rock phosphate constitutes mainly of
Fluorapatite
Di-calcium phosphate
Mono-calcium phosphate
Di-ammonium phosphate
✅ The correct answer is option A.
Fertilizer Technology MCQs
42. Steam reforming of naphtha produces ammonia synthesis gas. This is a/an __________ process.
Autocatalytic
Endothermic
Exothermic
Non-catalytic
✅ The correct answer is option B.
43. Which is the most suitable fertiliser for paddy?
CAN
Ammonium sulphate
Ammonium nitrate
Superphosphate
✅ The correct answer is option B.
44. C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about
2
6
13
20
✅ The correct answer is option B.
45. Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber’s process?
High pressure, low reactants concentration, high temperature
High pressure, low reactants concentration, low temperature
High pressure, high reactants concentration, low temperature
Low pressure, high reactants concentration, low temperature
✅ The correct answer is option C.
46. Which of the following does not come under the category of ‘micro-nutrient’ for plant growth?
Chlorine
Iron
Boron
Carbon
✅ The correct answer is option D.
47. __________ is the most suitable fertiliser for paddy.
Urea
Ammonium sulphate
Superphosphate
Potassium nitrate
✅ The correct answer is option B.
48. In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable
CaSO₄ .½H₂O and CaSO₄ crystals
Pyrophosphoric acid
Metaphosphoric acid
All of the above
✅ The correct answer is option A.
49. NPK means a __________ fertiliser.
Mixed
Potassic
Liquid
Solid
✅ The correct answer is option A.
50. Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?
Water
Naphtha
Tar
Coal/coke oven gas
✅ The correct answer is option C.