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NEET2026ChemistryHydrocarbonsActual

The number of chlorine atoms present in the organic products X and Y of the following reactions, respectively, are : C ₆ H ₆ + 6 Cl ₂ [ dark, cold ] Anhydr. AlCl ₃ X C ₆ H ₆ + 3 Cl ₂ [500 K ] UV Y

Options

  1. A3 and 3
  2. B6 and 3
  3. C6 and 6
  4. D3 and 6

Correct answer

C. 6 and 6

Step-by-step solution

Reaction 1 is an electrophilic aromatic substitution. Benzene reacts with excess chlorine in the presence of anhydrous AlCl ₃ (a Lewis acid) to form hexachlorobenzene ( C ₆ Cl ₆ ). C ₆ H ₆ + 6 Cl ₂ [ dark, cold ] Anhydr. AlCl ₃ C ₆ Cl ₆ + 6 HCl The organic product X is hexachlorobenzene, which contains 6 chlorine atoms. Reaction 2 is a free radical addition reaction. Benzene reacts with chlorine in the presence of UV light to form benzene hexachloride ( C ₆ H ₆ Cl ₆ ), also known as gammaxene or lindane. C ₆ H ₆ +

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