Question

In the following molecule,

Hybridisation of Carbon a, b and c respectively are :

• A. sp³, sp², sp²
• B. sp³, sp, sp
• C. sp², sp, sp²
• D. sp³, sp, sp

Hint:

Shortcut: Single bonds only $\rightarrow$ sp³; One double bond $\rightarrow$ sp²; One triple bond or two cumulative double bonds $\rightarrow$ sp.

Answer 1

The Correct Option is B

Step 1: Carbon 'a' (\(CH_3\)) is bonded to 4 other atoms via single sigma bonds. Total \(\sigma\) bonds = 4, so it is sp³ hybridized.
Step 2: Carbon 'b' is part of a triple bond (\(C \equiv C\)). It has 2 \(\sigma\) bonds (one to Carbon 'a', one to Carbon 'c'). Total \(\sigma\) bonds = 2, so it is sp hybridized.
Step 3: Carbon 'c' is also part of the triple bond and has 2 \(\sigma\) bonds (one to Carbon 'b', one to Hydrogen). Total \(\sigma\) bonds = 2, so it is sp hybridized.