Which of the following pair of compounds represents chain isomers?
A
I and II
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B
I and III
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C
I and IV
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D
II and IV
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Solution
The correct option is B I and II I and II is the pair of compounds that represents chain isomers. The carbon chain in compound I is branched (straight) and the carbon chain in compound II is branched. Another example of chain isomers is n butyl amine and isobutyl amine. Chain isomers have same molecular formula but different carbon skeleton.