A hydrocarbon with 5 carbons and there is a double bond between the $2^{n d}$ and the $3^{r d}$ carbons, what is it named as?

Pentene

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Pent-1-ene

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Pent-2-ene

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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 the main chain having 5 carbons with the double bond position at 2 is Pent-2-ene.

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

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 the main chain having 5 carbons with the double bond position at 2 is Pent-2-ene.

A hydrocarbon with 5 carbons and there is a double bond between the $2^{n d}$ and the $3^{r d}$ carbons, what is it named as?

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 the main chain having 5 carbons with the double bond position at 2 is Pent-2-ene.