Fertiliser Technology MCQ Questions & Answers

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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Answer & Solution

Answer: Option A

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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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Answer & Solution

Answer: Option A

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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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Answer & Solution

Answer: Option C

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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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Answer: Option D

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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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Answer & Solution

Answer: Option B

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6

Iron is not used alone as a catalyst in ammonia synthesis, because

A) Its activity declines rapidly, if heated to above 520°C B) It decomposes ammonia C) It gets oxidised above 500°C D) None of these

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Answer & Solution

Answer: Option A

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7

Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.

A) 5 B) 20 C) 50 D) 65

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Answer & Solution

Answer: Option B

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8

Which of the following fertilisers contains the least percentage of nitrogen?

A) Liquid ammonia B) Urea C) Ammonium phosphate D) Ammonium sulphate

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Answer & Solution

Answer: Option C

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9

Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95 - 97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

A) Decreasing the pressure B) Decreasing the temperature C) Increasing the temperature D) None of these

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Answer: Option C

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10

Reaction of anhydrous liquid ammonia with orthophosphoric acid produces

A) Ammonium phosphate B) Superphosphate C) Triple superphosphate D) None of these

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Answer & Solution

Answer: Option A

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Fertiliser Technology MCQ Questions & Answers | Chemical Engineering