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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 20°C 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 :

1. (A) is false but (R) is true.
2. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
3. (A) is true but (R) is false
4. Both (A) and (R) are correct and (R) is the correct explanation of (A)

Correct answer: (A) is false but (R) is true.

Solution

The assertion is incorrect because propanol and propanone have boiling points that are too close (only about 15°C apart) for effective separation by simple distillation. However, the reason is accurate as it states that a significant boiling point difference (greater than 20°C) is necessary for simple distillation to be effective.

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