NEET2026ChemistryChapterActual
Observe the given reaction scheme showing various methods for the preparation of benzaldehyde. Match the pathways labelled P, Q, R, and S in List I with their corresponding reaction names or types in List II. List I List II A Pathway P 1 Etard reaction B Pathway Q 2 Side-chain chlorination C Pathway R 3 Rosenmund reduction D Pathway S 4 Stephen reaction Choose the correct answer from the options given below.
Options
- A(A)-(4), (B)-(3), (C)-(2), (D)-(1)
- B(A)-(3), (B)-(4), (C)-(1), (D)-(2)
- C(A)-(3), (B)-(4), (C)-(2), (D)-(1)
- D(A)-(1), (B)-(2), (C)-(3), (D)-(4)
Correct answer
B. (A)-(3), (B)-(4), (C)-(1), (D)-(2)
Step-by-step solution
Pathway P: The reduction of benzoyl chloride to benzaldehyde using H₂ in the presence of Pd-BaSO₄ is known as the Rosenmund reduction. Thus, A 3. Pathway Q: The reduction of benzonitrile to benzaldehyde using SnCl₂ and HCl followed by acidic hydrolysis is known as the Stephen reaction. Thus, B 4. Pathway R: The oxidation of toluene to benzaldehyde using chromyl chloride ( CrO₂Cl₂ ) is known as the Etard reaction. Thus, C 1. Pathway S: The reaction of toluene with Cl₂ in the presence of sunlight ( h ) yields benzal