Fertiliser Technology MCQ Questions & Answers

31

CaH₄(PO₄)₂ is the chemical formula of

A) Superphosphate B) Triple superphosphate C) Calcium phosphate D) Meta phosphoric acid

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Answer & Solution

Answer: Option B

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32

Pick out the wrong statement.

A) Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty B) Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis C) Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables D) Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis

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Answer & Solution

Answer: Option C

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33

Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.

A) Exothermic B) Endothermic C) Autocatalytic D) Catalytic

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Answer & Solution

Answer: Option B

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34

Nitrogen content of urea is about __________ percent.

A) 10 B) 46 C) 80 D) 94

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Answer & Solution

Answer: Option B

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35

Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

A) Sulphuric B) Hydrochloric C) Either A or B D) Neither A nor B

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Answer & Solution

Answer: Option C

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36

Ammonia synthesis reaction is

A) Exothermic B) Endothermic C) Autocatalytic D) None of these

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Answer & Solution

Answer: Option A

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37

Ammonium nitrate is

A) Having about 40% N₂ B) Not hygroscopic C) Not prone to explosive thermal decomposition D) Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

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Answer & Solution

Answer: Option D

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38

Fertiliser plants get their N₂ requirements

A) By fractionation of liquified air B) By dissociating oxides of nitrogen C) From coal gas (coke oven gas) D) From producer gas

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Answer & Solution

Answer: Option A

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39

Electric process as compared to wet process (for the manufacture of phosphoric acid)

A) Can use only high grade phosphate rock B) Is used less frequently C) Produces a valuable by-product called gypsum D) Is weak acid process

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Answer & Solution

Answer: Option B

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40

Conditioners like finely divided peat are added to the fertiliser to

A) Counteract burning B) Avoid caking & hardening C) Produce bulk D) Increase its solubility

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Answer & Solution

Answer: Option B

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Fertiliser Technology MCQ Questions & Answers | Chemical Engineering