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Which of the following organic compounds has the same hybridization as the carbon atom in its combustion product, CO2?

1. Ethane
2. Ethyne
3. Ethene
4. Ethanol

Correct answer: Ethyne

Solution

Ethyne has sp hybridization, which is the same as the carbon atoms in carbon dioxide (CO2). In CO2, the carbon atom forms two double bonds with oxygen, requiring sp hybridization to accommodate the linear geometry.

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