Calcination reaction of limestone (CaCO3 → CaO + CO2) goes to completion in the rotary kiln, because____________________?
Correct answer: A. CO2 escapes continuously
- A. CO2 escapes continuously
- B. CaO is not dissociated
- C. Of high calcination temperature
- D. CaO is more stable than CaCO3
Explanation
Continuous removal of CO2 lowers its partial pressure and shifts CaCO3 decomposition toward CaO and CO2, allowing the reaction to proceed further. High temperature helps, but continuous CO2 escape is the key reason for completion.
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
Which of the following is not endothermic in nature ?
Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in ___________________?
A balanced chemical reaction equation conforms to the law of________________?
Participation of _______________ is involved in the occurrence of a chemical reaction?
Ore concentration by jigging is based on the difference in the ______________ of the particles?
Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?