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JEE Main · 2024 · 01 Feb 2024 · Shift 1 · Hydrocarbons

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Identify A and B in the following sequence of reaction
  1. (A)(see structure)
    Structure A
    A
    Structure B
    B
  2. (B)(see structure)
    Structure A
    A
    Structure B
    B
    ✓ Correct
  3. (C)(see structure)
    Structure A
    A
    Structure B
    B
  4. (D)(see structure)
    Structure A
    A
    Structure B
    B

Answer: (B)

Solution

Toluene undergoes free-radical chlorination at the benzylic (side-chain) position under Cl/h, converting the group step by step into (benzal chloride), which is compound A. Hydrolysis of a gem-dichloride () with HO at 373 K gives the corresponding aldehyde (benzaldehyde), compound B:

JEE Main · 2024 · 01 Feb 2024 · Shift 1 · Single correct option

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