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Question

Which of the following are structural isomers?

A
2-methylpropane, propane
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B
Methane, 2-methylpropane
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C
Butane, 2-methylpropane
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D
n-propane, n-butane
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Solution

The correct option is C Butane, 2-methylpropane
Structural isomers are molecules with same molecular formula but different structures.

The structural formula of methane, ethane and propane reflects that they do not have sufficient carbons to form branched chain. Hence, isomerism is not possible for these compounds.

The compounds butane and 2-methylpropane have same molecular formula C4H10 but posses different structures.




Hence, they are structural isomers.

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