Temperature and pressure in urea autoclave is_________________?
Correct answer: B. 190°C and 200 atm
- A. 120°C and 300 atm
- B. 190°C and 200 atm
- C. 400°C and 550 atm
- D. 200°C and 10 atm
Explanation
Industrial urea synthesis is carried out near 190°C and about 200 atm so that ammonia and carbon dioxide remain reactive and the carbamate-to-urea reaction proceeds effectively. The other temperature-pressure combinations are not typical urea-autoclave conditions.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) ?
During conversion of ammonium carbamate into urea, presence of large excess of water______________?
Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?
_____________ is the undesirable by-product produced in the manufacture of urea ?
A Potassic fertiliser contains 50% K2O. It could be _________________?
Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in__________________?