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Question

Which of the following IUPAC name is correct?



A
3-ethyl-2-methylpentane
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B
3-ethyl-4-methylpentane
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C
3-ethyl-2-methylpentene
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D
3-metyl-2-ethylpentene
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Solution

The correct option is A 3-ethyl-2-methylpentane
Longest carbon chain is 5 carbon- pentane.
Substituents are arranged in their alphabatical order and giving least possible substituent positions.
IUPAC name : 3-ethyl-2-methylpentane.

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