Question

Match List - I with List - II. 

• A. (A)-(I), (B)-(III), (C)-(II), (D)-(IV)
• B. (A)-(III), (B)-(II), (C)-(I), (D)-(II)
• C. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• D. (A)-(II), (B)-(III), (C)-(I), (D)-(IV)

Hint:

The reactions listed here are all methods of forming aldehydes from different starting materials such as nitriles, chlorobenzene, and acyl chlorides. Familiarity with reagents and reaction conditions helps in correctly identifying the reaction type.

Answer 1

The Correct Option is A

- The reaction between an isonitrile (RCN) and stannic chloride (\( \text{SnCl}_4 \)) followed by hydrolysis forms the corresponding aldehyde, which corresponds to the Etard reaction.
- The reaction of chlorobenzene with HCl in the presence of heat gives the corresponding aldehyde via the Gatterman-Koch reaction.
- The Rosenmund reduction uses hydrogenation of acyl chlorides to aldehydes.
- The Stephen reaction involves the reduction of aromatic nitriles to aldehydes using stannous chloride.

Final Answer: Option (1).