Question

Basic strength of
$\underset{I}{CH}\equiv \stackrel{\ominus }{C},C{H}_2\underset{II}{=}\stackrel{\ominus }{C}H,C{H}_3\underset{III}{-}\stackrel{\ominus }{C}{H}_2$will be in order

• A. I < II < III
• B. II < III < I
• C. III < II < I
• D. III < I < II

Answer 1

The correct option is A I < II < III

In (III), (II) and (I) $C$ is $s{p}^3$, $s{p}^2$, $sp$ hybridised respectively. Basic strength increases as the $\%$ of s-character decreases. Hence option a is correct.