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Question

A hydrocarbon with five carbon atoms and a double bond between the second and the third carbon atom is named as .

A
pent-2-ene
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B
hept-3-ene
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C
hept-2-ene
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D
pent-3-ene
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Solution

The correct option is A pent-2-ene
The root word of this compound is 'pent' as there are five carbons in the parent chain.

Since there is a double bond present between second and the third carbon, the suffix is 'ene'.

Thus, the name of the compound becomes pent-2-ene.
It is represented as CH3CH=CHCH2CH3.

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