Match List - I with List - II. array l List - I & List - II \\ Reagents & Reaction Name (Involving aldehydes) \\ A. H _ 2 , Pd - BaSO _ 4 & I. Etard Reaction \\ B. SnCl _ 2 , HCl & II. Rosenmund Reduction \\ C. CrO _ 2 Cl _ 2 , CS _ 2 & III. Gatterman - Koch Reaction \\ D. CO , HCl , Anhyd. AlCl _ 3 & IV. Stephen Reaction array Choose the correct answer from the options given below :
B. A-II, B-IV, C-I, D-III
Matching reagents with aldehyde reaction types: A (H2, Pd-BaSO4) is the Lindlar/Rosenmund catalyst used in Rosenmund Reduction to convert acyl chlorides to aldehydes, matching with II. B (SnCl2, HCl) is used in Stephen Reaction where nitriles are converted to aldehydes via imine intermediate, matching with IV. C (CrO2Cl2, CS2) is Jones-like reagent used in Etard Reaction for oxidizing methyl groups on aromatic rings to aldehydes, matching with I. D (CO, HCl, Anhyd. AlCl3) is the Gatterman-Koch Reaction which directly converts benzene to benzaldehyde using CO and AlCl3 catalyst, matching with III. Therefore the correct matching is A-II, B-IV, C-I, D-III
Related: Chemistry — Aldehydes and Ketones · All PYQ Banks