Question

Number of deactivating groups among: \( -Cl, -SO_3H, -OH, -NHC_2H_5, -COOCH_3, -CH_3 \)

• A. 4
• B. 3
• C. 2
• D. 1

Hint:

Deactivating groups withdraw electron density, making electrophilic substitution slower.

Answer 1

The Correct Option is B

Step 1: Identify Deactivating Groups 
- Deactivating (-I or -M effects): 
- \( -Cl \), \( -SO_3H \), \( -COOCH_3 \) - Activating (+M or +I effects): 
- \( -OH \), \( -NHC_2H_5 \), \( -CH_3 \)

Step 2: Count Deactivating Groups There are 3 deactivating groups.