Assertion (A): It is not possible to separate the components of an azeotrope by fractional distillation.
Reason (R): Components of an azeotrope have the same composition in liquid and vapour phase and boil at a constant temperature.
Reason (R): Components of an azeotrope have the same composition in liquid and vapour phase and boil at a constant temperature.
Show Hint
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
The Correct Option is A
Solution and Explanation
Fractional distillation separates liquids only when the vapour has a different composition from the boiling liquid. An azeotrope is a constant boiling mixture.
Step 1:
Assertion: An azeotrope cannot be separated into its components by fractional distillation. This is TRUE.
Step 2:
Reason: An azeotrope boils at a constant temperature and the vapour formed has the same composition as the liquid. This is TRUE, and it is exactly why distillation cannot change the composition and so cannot separate the components.
Step 3:
Since both statements are true and the Reason correctly explains the Assertion, the answer is option (A).
Answer: Option (1) — Both A and R are true and R is the correct explanation of A.
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