Question 61 : __________ is the undesirable by-product produced in the manufacture of urea.
1. Ammonium carbonate
2. Biuret
3. Ammonium carbamate
4. Carbon dioxide
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Question 62 : Which of the following fertilisers is used as a cattle feed?
1. Calcium ammonium nitrate
2. Urea
3. Superphosphate
4. Ammonium sulphate
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Question 63 : Main constituent of phosphate rock is
1. flour apatite
2. calcium fluoride
3. ammonium phosphate
4. calcium phosphate
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Question 64 : Which is the best fertiliser for paddy ?
1. Nitro-phosphate
2. Potassium nitrate
3. Superphosphate
4. Ammonium sulphate
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Question 65 : __________ is not a fertiliser.
1. Calcium ammonium nitrate
2. Ferrous sulphate
3. Liquid ammonia
4. Ammonium sulphate
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Question 66 : Catalyst used in desulphurisation of naphtha is
1. Co-Mo
2. silica gel
3. nickel
4. Pt-Rh
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Question 67 : Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and
1. ammonia
2. ammonium nitrate
3. nitric oxide
4. nitric acid
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Question 68 : pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.
1. 7-8
2. 4-5
3. 9-10
4. 12-13
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Question 69 : Biuret formation in urea is kept at minimum (< 1 %), because it is
1. corrosive in nature.
2. explosive in nature.
3. helpful in decomposition of urea.
4. toxic and harmful to some crops.
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Question 70 : Temperature and pressure in ammonia converter is
1. 450 atm, 200°C
2. 200 atm, 1000°C
3. 450 atm, 550°C
4. 450 atm, 1000°C
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