Solved: CHEMISTRY Question for NEET

NEET CHEMISTRYEasy

The reaction among the following that proceeds through an electrophilic substitution reaction is:

(Option 1 Structure Missing)

(Option 2 Structure Missing)

(Option 4 Structure Missing)

Definition: Electrophilic aromatic substitution is a characteristic reaction of aromatic compounds where an electrophile replaces a hydrogen atom on the benzene ring .
Mechanism: The reaction typically involves the generation of an electrophile ( $E^+$ ) using a Lewis acid catalyst (like $AlCl_3$ , $FeBr_3$ ), followed by the attack of the electrophile on the benzene ring to form a carbocation intermediate (arenium ion), and finally the loss of a proton to restore aromaticity .
Context (NEET 2019): While the options are missing in the input, standard NEET questions on this topic often compare:

Free Radical Substitution: e.g., Chlorination of benzene in UV light ( $C_6H_6 + 3Cl_2 \xrightarrow{h\nu} C_6H_6Cl_6$ ) or chlorination of alkyl groups (toluene side chain).
Nucleophilic Substitution: Rare in simple arenes, requires strong electron-withdrawing groups.
Addition Reaction: e.g., Hydrogenation ( $C_6H_6 + 3H_2 \xrightarrow{Ni} C_6H_{12}$ ) .
Electrophilic Substitution: e.g., Chlorination of benzene with $Cl_2/AlCl_3$ ( $C_6H_6 + Cl_2 \xrightarrow{AlCl_3} C_6H_5Cl + HCl$ ). This fits the criteria for electrophilic substitution .

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