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Question

Which type of isomerism is shown by But-1-yne and cyclobutene?

A
Chain isomerism
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B
Position isomerism
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C
Ring-chain isomerism
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D
Metamerism
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Solution

The correct option is C Ring-chain isomerism

The structural isomers with same molecular formula but possessing both cyclic structures and open chain structures will show Ring-Chain isomerism.

Here, But-1-yne is open chain and Cyclobutene is cyclic. Hence , they shows ring-chain isomers.
All ring chain isomers are functional isomers but all functional isomers are not ring-chain isomers


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