Question

In the given structure, number of \( sp \) and \( sp^2 \) hybridized carbon atoms present respectively are: 

• A. \( 3 \) and \( 5 \)
• B. \( 4 \) and \( 5 \)
• C. \( 3 \) and \( 6 \)
• D. \( 4 \) and \( 6 \)

Hint:

Carbon atoms involved in triple bonds are \( sp \)-hybridized, while those involved in double bonds (or with a lone pair) are \( sp^2 \)-hybridized.

Answer 1

The Correct Option is A

- The structure contains \( sp \) and \( sp^2 \) hybridized carbon atoms.
- The carbon atoms in triple bonds (i.e., the C≡N bond) are \( sp \)-hybridized.
- The carbon atoms in the C=C double bonds and in the C=O group are \( sp^2 \)-hybridized.
- Thus, the number of \( sp \)-hybridized atoms is 3 and the number of \( sp^2 \)-hybridized atoms is 5.

Final Answer: Option (1).