Question

Molecule in which the distance between the two adjacent carbon atoms in largest is:

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

Answer 1

The correct option is A Ethane

Bond length order - $sp-sp<s{p}^2-s{p}^2<s{p}^3-s{p}^3$

So, the carbon-carbon atoms bond in each of these molecules can be analyzed as:

A: $C{H}_3-C{H}_3$ $s{p}^3-s{p}^3$ bond

B: $C{H}_2=C{H}_2$ $s{p}^2-s{p}^2$ bond

C: $CH\equiv CH$ $sp-sp$ bond

D: $C_6{H}_6$ $s{p}^2-s{p}^2$ bond

Based on the bond length order, (a) has largest distance between the two adjacent carbon atoms.