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Question

A hydrocarbon with 5 carbons and there is a double bond between the 2nd and the 3rd carbons, what is it named as?


A

Pentene

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B

Pent-1-ene

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C

Pent-2-ene

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D

Pent-3-ene

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Solution

The correct option is C

Pent-2-ene


While naming unsaturated compounds, we consider the number of the least value as the position of the double bond. So in a main chain having 5 carbons with double bond position at 2 is Pent-2-ene.


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