Which of the following pairs of compounds are | vedclass

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(A) Positional isomers are compounds that have the same molecular formula and the same functional group,but the functional group is attached to differ

Vedclass · Accepted Answer

$CH_3-CH_2-CH_2-CO-CH_3$ and $CH_3-CH_2-CO-CH_2-CH_3$

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(A) Positional isomers are compounds that have the same molecular formula and the same functional group,but the functional group is attached to different positions on the carbon chain.In option $A$,$CH_3-CH_2-CH_2-CO-CH_3$ is $pentan-2-one$ and $CH_3-CH_2-CO-CH_2-CH_3$ is $pentan-3-one$.Both have the same molecular formula $C_5H_{10}O$ and the same ketone functional group,but the carbonyl group is at the $C-2$ position in the first compound and the $C-3$ position in the second compound.Therefore,they are positional isomers.

Which of the following pairs of compounds are positional isomers?

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