Assertion :Pentane and 3-methylpentane are chain isomers. Reason: Pentane is a straight-chain alkane while 3-methyl pentane is a branched-chain alkane

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect and Reason is correct

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Solution

The correct option is D Assertion is incorrect and Reason is correct
Pentane and 3-methyl pentane are not chain isomers.
Pentane is a straight chain alkane and 3-methyl pentane is a branched-chain alkane is correct statement.

$n - p e n t a n e$ $3 - m e t h y l - p e n t a n e$
Assertion is incorrect and reason is correct.
So answer is D.

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