Na₅P3O₁₀
Na₄P3O₈
Na₃P4O₆
Na₂PO₄
✅ The correct answer is option A.
Chemical Engineering MCQs
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.
Triple superphosphate is made by reacting phosphate rock with __________ acid.
Phosphoric
Nitric
Sulphuric
Hydrochloric
✅ The correct answer is option A.
Iron is not used alone as a catalyst in ammonia synthesis, because
Its activity declines rapidly, if heated to above 520°C
It decomposes ammonia
It gets oxidised above 500°C
None of these
✅ The correct answer is option A.
Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?
Electrolysis of water
Cryogenic removal of H₂ from coke oven gas
Steam reforming of naphtha
Natural gas cracking
✅ The correct answer is option A.
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.
Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it
Has a pungent smell
Vaporises at normal temperature
Is toxic and highly corrosive
Is in short supply
✅ The correct answer is option B.
Reaction of nitric acid and sulphuric acid with phosphate rock produces
Nitrophosphate
Diammonium phosphate
Tricresyl phosphate
Tributyl phosphate
✅ The correct answer is option A.
Nitrogen content of urea is about __________ percent.
10
46
80
94
✅ The correct answer is option B.
Catalyst used in Haber’s process for ammonia production is
Reduced iron oxide
Nickel
Vanadium pentoxide
Silica gel
✅ The correct answer is option A.