3773. Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant?
Urea
CAN
Ammonium sulphate
Superphosphate
✅ The correct answer is option C.
3777. Dehydration of ammonium carbamate produces
Urea
Biuret
Ammonia water
None of these
✅ The correct answer is option A.
3782. Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of
Comparatively higher pressure drop
High cost of the high pressure vessel used for the reactor
Higher pumping cost
Chances of entrainment and disturbance of catalyst bed
✅ The correct answer is option B.
3746. Liquid ammonia is not used as such a fertiliser in tropical countries like India, because
Its N₂ content is very low
It is very costly
It will evaporate on spraying
It is not available
✅ The correct answer is option C.
3752. Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils?
Urea
CAN
Ammonium sulphate
Calcium cyanamide
✅ The correct answer is option D.
3757. Reaction of orthophosphoric acid with phosphate rock produces
Superphosphate
Triple superphosphate
Metaphosphoric acid
Monoammonium phosphate
✅ The correct answer is option B.
3763. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature
Rate of reaction is very low
Very high pressure is required resulting in costly pressure vessel
Space velocity of gas is very low resulting in decreased conversion
None of these
✅ The correct answer is option A.
3769. P₂O₅ content in triple superphosphate is about __________ percent.
42-50
15-20
85-90
70-75
✅ The correct answer is option A.
3774. The optimum size of the ammonia plant is __________ tons/day.
10
100
1000
1000C
✅ The correct answer is option C.
3736. “Critical mass” is the minimum mass of nuclear fissile material required for the
sustainment of chain reaction.
power generation on commercial scale.
economic power generation.
none of these.
✅ The correct answer is option A.