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JEE Advanced2023ChemistryAldehydes and KetonesActual

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option. List I List II ( P ) Etard reaction 1 Acetophenone → Zn - Hg , HCl ( Q ) Gattermann reaction 2 Toluene → ( ii ) SOCl 2 ( i ) KMnO 4 , KOH , Δ ( R ) Gattermann-Koch reaction 3 Benzene → Anhyd . AlCl 3 CH 3 Cl ( S ) Rosen

Options

  1. AP   →   2 ;   Q   →   4 ;   R   →   1 ;   S &#1
  2. BP   →   1 ;   Q   →   3 ;   R   →   5 ;   S &#1
  3. CP   →   3 ;   Q   →   2 ;   R   →   1 ;   S &#1
  4. DP   →   3 ;   Q   →   4 ;   R   →   5 ;   S &#1

Correct answer

D. P   →   3 ;   Q   →   4 ;   R   →   5 ;   S &#1

Step-by-step solution

Toluene is formed in the Friedel Craft's reaction, which is the reactant in Etard reaction. The Etard reaction is a chemical reaction that involves the direct oxidation of an aromatic or heterocyclic bound methyl group to an aldehyde using chromyl chloride. Aniline on diazotization reaction gives benzene diazonium salt, which is the starting material for Gattermann reaction. Gattermann reaction is used for obtaining chlorobenzene or bromobenzene from benzenediazonium chloride by treating it with Cu / HCl  

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