The double bond in ethene is formed from a
Correct answer: D. Sigma and pi-bond
- A. Sigma-bond only
- B. pi-bond only
- C. lone pairs
- D. Sigma and pi-bond
Explanation
The double bond in ethene is formed from both a sigma bond and a pi bond. The sigma bond results from the overlap of sp2 hybridized orbitals, while the pi bond arises from the side-to-side overlap of p orbitals. This combination of sigma and pi bonds constitutes the double bond in ethene. Option A is incorrect because the double bond in ethene involves both sigma and pi bonds. Option B is incorrect because the double bond in ethene consists of both sigma and pi bonds. Option C is incorrect because the double bond in ethene is not formed from lone pairs.
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Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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