Fertiliser Technology MCQ Questions & Answers

71

Reaction of phosphate rock with 98% H₂SO₄ produces

A) Orthophosphoric acid B) Superphosphate C) White phosphorous D) None of these

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Answer & Solution

Answer: Option A

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72

Reaction of calcium fluorapatite with sulphuric acid produces

A) Ortho-phosphoric acid B) Simple superphosphate C) Triple superphosphate D) Red phosphorous

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Answer & Solution

Answer: Option B

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73

Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in

A) Low bulk density product B) Biuret formation C) Non-spherical prills D) Substantially wet non-flowing and sticky product

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Answer & Solution

Answer: Option B

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74

Urea is a __________ fertiliser.

A) Nitrogenous B) Potassic C) Phosphatic D) None of these

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Answer & Solution

Answer: Option A

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75

Pick out the wrong statement.

A) 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid B) Chemically unreactive nature of red phosphorous is due to its polymeric structure C) Red phosphorous is the most reactive allotropic form of phosphorous D) Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation

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Answer & Solution

Answer: Option C

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76

Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?

A) Nitrogeneous fertiliser B) Potassic fertiliser C) Phosphatic fertiliser D) None of these

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Answer & Solution

Answer: Option A

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77

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

A) Ammonium carbonate B) Biuret C) Carbon dioxide D) Ammonium carbamate

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Answer & Solution

Answer: Option B

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78

In the manufacture of H₃PO₄ (ortho); strong H₂SO₄ leaching wet process as compared to electric furnace process

A) Uses lower grade phosphate rock B) Requires lower capital investment in the plant C) Produces lower purity acid D) Is very costly

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Answer & Solution

Answer: Option C

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79

NPK fertiliser is a __________ fertiliser.

A) Complex B) Mixed C) Nitrogenous D) Phosphatic

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Answer & Solution

Answer: Option B

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80

Raw materials for urea production are

A) CO₂ and N₂ B) CO₂, H₂ and N₂ C) NH₃ and CO D) HNO₃ and CaCO₃

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Answer & Solution

Answer: Option B

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Fertiliser Technology MCQ Questions & Answers | Chemical Engineering