Which of the following pairs of alkenes is an example of position isomers?

1. But-1-ene and 2-methylprop-1-ene
2. But-1-ene and 2-methylbut-1-ene
3. But-1-ene and but-2-ene
4. But-2-ene and 2-methylprop-1-ene

Solution

For position isomer locant number of $\mathrm{FG}|\mathrm{MB}| \mathrm{S} . \mathrm{C}$ must be differ. Locant of double bond will be differ.

Asked in: MHT CET 2021 (20 Sep Shift 1)

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