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Which of the following alkenes is more stable due to hyperconjugation?

1. cis-2-butene
2. trans-2-butene
3. 2-methylpropene
4. 1-butene

Correct answer: 2-methylpropene

Solution

2-methylpropene is more stable due to hyperconjugation as it has more alkyl groups attached to the double-bonded carbon atoms, increasing electron donation and stability.

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