Assertion :Pent-1-ene and 2-methylbut-1-ene are position isomers. Reason: Position isomers have the same molecular formula but differ in the position of functional group.

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 are correct

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Solution

The correct option is D Assertion is incorrect and Reason are correct
Pent-1-ene and 2-methyl but 1-ene are not position isomers they are constitutional isomers.

$C H_{3} C H_{2} C H_{2} C H = C H_{2}$ , $C H_{3} C H_{2} C (C H_{3}) = C H_{2}$ .
Pent-1-ene 2-methyl but-1-ene

Assertion is wrong.

Position isomers have the same molecular formula but differ in the position of functional group.

Reason is correct one.

So answer is D.

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