StemCET Logo

Chemistry Question 56 – JEE-MAIN 2026

← Back
Match the LIST-I with LIST-II List-IList-IIReactionMechanismA. Williamson SynthesisI. Electrophilic additionB. Friedel Craft ReactionII. Free radical substitutionC. Bromination of vinyl benzeneIII. Nucleophilic substitutionD. Chlorination of toluene in lightIV. Electrophilic substitution Choose the correct answer from the options given below:

Recall the fundamental mechanism associated with each named reaction or type of transformation.

Step 1: Analyze Williamson Synthesis and Friedel-Crafts Reaction✦ Active

A. Williamson Synthesis involves an alkoxide reacting with a primary alkyl halide to form an ether. This is a classic example of a nucleophilic substitution (SN2) reaction. Therefore, A matches with III.

B. Friedel-Crafts Reaction (alkylation or acylation) is a type of electrophilic aromatic substitution where an electrophile attacks an aromatic ring. Therefore, B matches with IV.

Step 2: Analyze Bromination of Vinyl Benzene and Chlorination of Toluene in Light○ Expand

C. Bromination of vinyl benzene (styrene) involves the addition of bromine across the carbon-carbon double bond. This reaction proceeds via an electrophilic addition mechanism. Therefore, C matches with I.

D. Chlorination of toluene in the presence of light (UV light) leads to substitution at the benzylic position (methyl group). This reaction occurs via a free radical substitution mechanism. Therefore, D matches with II.

Step 3: Match the Reactions with Mechanisms○ Expand

Combining the matches from the previous steps:

A - III (Nucleophilic substitution)

B - IV (Electrophilic substitution)

C - I (Electrophilic addition)

D - II (Free radical substitution)

This combination corresponds to option 3.

💡 Teacher's Secret Hint

Always double-check each match to ensure accuracy, especially for reactions with similar-sounding names but different mechanisms.

✦ STEM Console utilizes AI models to generate step-by-step explanations and math clues. AI can make mistakes.