Question

Match List - I with List - II.

Choose the correct answer from the options given below :

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

Hint:

Associate name reactions with their unique "key reagents": Stephen = Tin chloride; Rosenmund = poisoned Palladium; Etard = Chromyl chloride.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Organic chemistry utilizes specific sets of reagents to perform named transformations of functional groups.

Step 3: Detailed Explanation:
A. \( H_2, Pd-BaSO_4 \): This reagent (Lindlar's catalyst) is used to reduce acid chlorides to aldehydes. This is known as the Rosenmund Reduction (II).
B. \( SnCl_2, HCl \): This combination reduces nitriles to imines, which are then hydrolyzed to aldehydes. This is the Stephen Reaction (IV).
C. \( CrO_2Cl_2, CS_2 \): Chromyl chloride is used to oxidize toluene (or its derivatives) to benzaldehyde. This is the Etard Reaction (I).
D. \( CO, HCl, Anhyd. AlCl_3 \): This mixture produces formyl chloride in situ, which reacts with benzene to form benzaldehyde. This is the Gatterman - Koch Reaction (III).
Therefore, the correct match is A-II, B-IV, C-I, D-III.

Step 4: Final Answer:
The correct matching is given in Option (B).