The maximum number of structural isomers possible for n-pentane is ______.
A
two
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B
three
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C
four
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D
five
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Solution
The correct option is B three Structural isomers are compounds with same molecular formula but different structural formula. n-Pentane can have a maximum of three isomers : 2-methylbutane, 2,2-dimethylpropane and n-pentane as shown below respectively.