3856. Promoter used in NH₃ synthesis catalyst is
K₂O
SiO₃
V₂O₅
U₂O₃
✅ The correct answer is option C.
3858. Catalytic ammonia synthesis reaction as in Haber’s process is
Endothermic
Exothermic
Irreversible
None of these
✅ The correct answer is option B.
3824. Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.
Catalytic
Exothermic
Endothermic
Reversible
✅ The correct answer is option B.
3828. Reaction of dilute sulphuric acid with phosphate rock produces
Phosphoric acid
Superphosphate
Triple superphosphate
Gypsum
✅ The correct answer is option A.
3833. Fertiliser plants get their N₂ requirements
By fractionation of liquified air
By dissociating oxides of nitrogen
From coal gas (coke oven gas)
From producer gas
✅ The correct answer is option A.
3839. Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.
Reversible
Catalytic
Exothermic
Endothermic
✅ The correct answer is option D.
3843. Reaction of anhydrous liquid ammonia with orthophosphoric acid produces
Ammonium phosphate
Superphosphate
Triple superphosphate
None of these
✅ The correct answer is option A.
3847. Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.
Increased biuret formation
High corrosion rate
Increased cost of equipment
All of the above
✅ The correct answer is option D.
3851. Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by
Decreasing the pressure
Decreasing the temperature
Increasing the temperature
None of these
✅ The correct answer is option C.
3857. Temperature and pressure in urea autoclave is
120°C and 300 atm
190°C and 200 atm
400°C and 550 atm
200°C and 10 atm
✅ The correct answer is option B.