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.Management Sciences
Category: Fertilizer Technology
Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ?
A. Calcium
B. Magnesium
C. Sulphur
D. Oxygen
Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ?
A. Calcium nitrate
B. Calcium ammonium nitrate (CAN)
C. Urea
D. Ammonium sulphate
Ammonia synthesis gas is produced from fuel oil by _________________?
A. Steam reforming
B. Hydro-cracking
C. Partial oxidation
D. Hydrogenation
With increases in pressure, the conversion of Ammonium carbamate into urea___________________?
A. Increases
B. Decreases
C. Remains unaltered
D. Can either increase or decrease depends on biuret content
Heating of ortho-phosphoric acid to 250°C produces___________________?
A. Meta-phosphoric acid
B. Pyrophosphoric acid
C. No change in it
D. None of these
Reaction of ortho-phosphoric acid with soda ash produces______________?
A. Sodium Tributyl phosphate (STPP)
B. Tricresyl phosphate
C. Tributyl phosphate
D. Nitrophosphate
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
Ammonium sulphate fertiliser is __________________?
A. The highest concentration nitrogenous fertiliser
B. The best fertiliser for paddy
C. A basic fertiliser
D. A neutral fertiliser
Biuret formation in urea is kept at minimum (< 1 %), because it is___________________?
A. Corrosive in nature
B. Toxic and harmful to some crops
C. Helpful in decomposition of urea
D. Explosive in nature
Which is the most suitable fertiliser for paddy ?
A. CAN
B. Ammonium sulphate
C. Ammonium nitrate
D. Superphosphate
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