Question

Decreasing order of reactivity towards electrophilie substitution for the following compounds is

• A. a > d > e > b > c
• B. e > d > a > b > c
• C. d > a > e > c > b
• D. c > b > a > d > e

Hint:

Electron-donating groups increase the reactivity of benzene rings towards electrophilic substitution

Answer 1

The Correct Option is B

• Reactivity is influenced by the electron density on the benzene ring: 
 

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. 
• Dimethylamine (\(NMe_2\)) and methoxy \((OCH_3)\) are strong electron-donating groups, en hancing reactivity. 
• Alkyl groups (CH₃) show moderate activating effects, while electron-withdrawing groups like trifluoromethyl (CF₃) reduce reactivity.