Question

Arrange them in increasing order of their bond length: Ethyne, Ethane, Ethene. Among them which one has lowest bond length?

• A. Ethane
• B. Ethene
• C. Ethyne
• D. Ethyne

Answer 1

Answer: (C)

EthyneBond length is inversely proportional to S % character.

So ethane has lowest S % character($s{p}^3$ hybridisation) so it has highest bond length and ethyne has highest S % character($sp$ hybridisation) so it has lowest bond length.

ethane>ethene>ethyne.