The incorrect statement regarding ethyne is

Question

Canvas Classes · Accepted Answer

Ethyne (HC≡CH) has a carbon–carbon triple bond.

Step 1 — Analyse each statement:

- (1) C≡C bond length ≈ 120 pm; C=C bond length ≈ 134 pm → ethyne C–C is shorter ✓ Correct
- (2) Each C in ethyne forms 2 σ bonds → sp hybridized ✓ Correct
- (3) sp hybridized carbons give 180° bond angle → linear ✓ Correct
- (4) Triple bond (bond order 3) is stronger than double bond (bond order 2). Saying it is weaker is incorrect ✗

Answer: Option (4)

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