Fertiliser Technology MCQ Questions & Answers | Chemical Engineering

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1.
Heating of orthophosphoric acid to about 900°C, produces

A. Metaphosphoric acid

B. Pyrophosphoric acid

C. No change in it

D. None of these

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2.
A potassic fertiliser contains 50% K₂O. It could be

A. Potassium sulphate

B. Potassium chloride

C. A mixture of NaCl+ KCl

D. None of these

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3.
Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

A. Its N₂ content is very low

B. It is very costly

C. It will evaporate on spraying

D. It is not available

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4.
Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils?

A. Urea

B. CAN

C. Ammonium sulphate

D. Calcium cyanamide

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5.
Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of

A. Comparatively higher pressure drop

B. High cost of the high pressure vessel used for the reactor

C. Higher pumping cost

D. Chances of entrainment and disturbance of catalyst bed

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