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  • Assertion (A) : Among isomeric pentanes, 2, 2-dimethylpentane has highest boiling point. Reason (R) : Branching does not affect the boiling point.

In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A) : Among isomeric pentanes, 2, 2-dimethylpentane has highest boiling point.
Reason (R) : Branching does not affect the boiling point.
(i) Both A and R are correct and R is the correct explanation of A.
(ii) Both A and R are correct but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv) A is not correct but R is correct.

Answers (1)

The answer is the option (iii) Both A and R are not correct.

Explanation: 2,2-dimethylpentane has the lowest boiling point among isomeric pentanes, and its boiling point decreases further on branching.

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