Question

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

• A. Ethene
• B. Ethyne
• C. Ethane

Answer 1

The correct option is B

Ethyne

Explanation for correct option

B. Ethyne

Bond 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.