Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) :
Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone.
Reason (R): Two liquids with a difference of more than in their boiling points can be separated by simple distillations.
In the light of the above statements, choose the most appropriate answer from the options given below :
Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone.
Reason (R): Two liquids with a difference of more than in their boiling points can be separated by simple distillations.
In the light of the above statements, choose the most appropriate answer from the options given below :
- (A)Both (A) and (R) are correct and (R) is the correct explanation of (A)✓ Correct
- (B)(A) is false but (R) is true.
- (C)(A) is true but (R) is false
- (D)Both (A) and (R) are correct but (R) is not the correct explanation of (A)
Answer: (A)
Solution
Propanone boils near and propan-1-ol near , a difference of about . Simple distillation separates two miscible liquids whose boiling points differ by more than about , because the vapour is then sufficiently enriched in the lower-boiling component. The wide boiling-point gap is the reason the mixture can be separated this way, so both the assertion and the reason are true and the reason is the correct explanation of the assertion.
JEE Main · 2021 · 31 Aug 2021 · Shift 1 · Single correct option