3679. Lower temperature and large excess of ammonia in urea melt
Increases biuret formation
Decreases biuret formation
Is undersirable
Does not effect biuret formation
✅ The correct answer is option B.
3681. Naphtha in a fertiliser plant is used as a source of
Fuel
H₂
N₂
O₂
✅ The correct answer is option B.
3686. Which of the following does not come under the category of ‘secondary nutrient’ for plant growth?
Calcium
Magnesium
Sulphur
Oxygen
✅ The correct answer is option D.
3691. Ammonium phosphate is a __________ fertiliser.
Nitrogenous
Phosphatic
Complex
Mixed
✅ The correct answer is option D.
3696. Potassic fertilisers do not promote the development of
Stems & leaves during early stage of plant growth
Starches of potatoes & grains
Sugar of fruits & vegetables
Fibrous materials of plants
✅ The correct answer is option A.
3700. __________ is the undesirable by-product produced in the manufacture of urea.
Ammonium carbonate
Biuret
Carbon dioxide
Ammonium carbamate
✅ The correct answer is option B.
3706. Electric furnace method for production of phosphorous uses phosphate rock
And phosphoric acid
And coke
And sulphuric acid
Silica and coke
✅ The correct answer is option D.
3673. Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.
250-300
500-750
950-1050
1400-1450
✅ The correct answer is option D.
3677. Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by
Adsorption on palladium
Cryogenic operations (low temperature cooling)
Absorption (using ethanolamine or pyragalloll solution)
None of these
✅ The correct answer is option B.
3682. Fertiliser produced during soda ash manufacture by dual process is ammonium
Chloride
Sulphate
Nitrate
None of these
✅ The correct answer is option A.