Question

# Amongst the following molecules, the one with the highest bond multiplicity is:EtheneEthyneEthane

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Solution

## The correct option is B EthyneExplanation for correct optionB. EthyneBond multiplicity:Bond multiplicity is determined by the number of bonds in a molecule.The more electrons the two atoms will share, the stronger will be the bond.The multiplicity of a chemical bond is determined by the number of electron pairs participating in chemical bonding.Among ethane$\left({\mathrm{C}}_{2}{\mathrm{H}}_{6}\right)$, ethene $\left({\mathrm{C}}_{2}{\mathrm{H}}_{4}\right)$, and ethyne $\left({\mathrm{C}}_{2}{\mathrm{H}}_{2}\right)$; the highest multiplicity will be in the ethyne molecule due to the presence of a triple bond.Explanation for incorrect options(A)Ethene(C)Ethane From the above structure, it can be said that bond multiplicity will be highest in the ethyne molecule. Thus options A and C stand incorrect.Hence, the correct option is B i.e. ethyne.

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