JEE Mains Chemistry Past PapershardMCQ SINGLE

The correct match between Item – I (starting material) and Item-II (reagent) for the preparation of JEE Mains Chemistry Past Papers Chemistry Question

Question

The correct match between Item – I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is: Item-I Item-II (I) Benzene (P) HCl and SnCl2, H3O+ (II) Benzonitrile (Q) H2, Pd-BaSO4,S and quinoline (III) Benzoyl Chloride (R) Co, HCl and AlCl3 (A) (I)-(R), (II)-(Q) and (III)-(P) (B) (I)-(Q), (II)-(R) and (III)-(P) (C) (I)-(P), (II)-(Q) and (III)-(R) (D) (I)-(R), (II)-(P) and (III)-(Q)

Answer: D

💡 Solution & Explanation

AlCl HCl Ca       CHO Gatterman-Koach reaction CN         O H HCl SmCl 2 CHO Stephan Reduction AlCl HCl Ca       CHO Rosenmund Reduction

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