NEETChemistryAldehydes and Ketones
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 SnCl 2 , H 3 O + (II) Benzonitrile (Q) H 2 , Pd - BaSO 4 , S and quinoline (III) Benzoyl Chloride (R) Co , HCl and AlCl 3
Options
- A(I)-(Q), (II)-(R) and (III)-(P)
- B(I)-(P), (II)-(Q) and (III)-(R)
- C(I)-(R), (II)-(P) and (III)-(Q)
- D(I)-(R), (II)-(Q) and (III)-(P)
Correct answer
C. (I)-(R), (II)-(P) and (III)-(Q)
Step-by-step solution
( array |l|l|l| Reactants & Reagents & Products & Reaction Name array l (a) Benzene, CO , HCl in the presence of anhydrous AlCl _ - 3 array & Benzaldehyde & Gattermann-Koch reaction array l (b) Benzonitrile, SnCl ₂, HCl followed by hydrolysis ( H _ - 3⁺ ) array & Benzaldehyde & Stephen Reduction array l (c) Benzoyl chloride, H ₂ in the presence of a poisoned palladium catalyst (e.g., Pd/BaSO ₄) array & Benzaldehyde & Rosenmund Reduction array )