Question
Question: Consider the following diazonium ions : (I) 
The order of reactivity towards diazo-coupling with phenol in the presence of dil. NaOH is –
A
I < IV < II < III
B
I < III < IV < II
C
III < I < II < IV
D
III < I < IV < II
Answer
I < III < IV < II
Explanation
Solution
Diazonium ion acts as electrophile in coupling reaction; greater the electron withdrawing power, higher the electrophilicity.