Match List-I with List-II
|
List-I (Name of Reaction) |
List-II (Reagents) |
|
(A) Stephens reaction |
(I) $CrO_2Cl_2/CS_2$ |
|
(B) Rosenmund reduction |
(II) Acyl chloride and anhyd. $AlCl_3$ |
|
(C) Etard reaction |
(III) $SnCl_2, HCl$ |
|
(D) Friedel Craft acylation |
(IV) $H_2/Pd-BaSO_4$ |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
|
List-I (Name of Reaction) |
List-II (Reagents) |
|
(A) Stephens reaction |
(III) $SnCl_2, HCl$ |
|
(B) Rosenmund reduction |
(IV) $H_2/Pd-BaSO_4$ |
|
(C) Etard reaction |
(I) $CrO_2Cl_2/CS_2$ |
|
(D) Friedel Craft acylation |
(II) Acyl chloride and anhyd. $AlCl_3$ |
- (A) Stephen Reaction: This reaction involves the reduction of nitriles to imines using stannous chloride ($SnCl_2$) and hydrochloric acid ($HCl$), which are then hydrolyzed to form aldehydes.
- Match: (A)-(III)
- (B) Rosenmund Reduction: In this process, acyl chlorides are selectively reduced to aldehydes by hydrogenation with hydrogen gas ($H_2$) over a palladium catalyst supported on barium sulfate ($Pd-BaSO_4$).
- Match: (B)-(IV)
- (C) Etard Reaction: This is an oxidation reaction where the methyl group of an aromatic ring (like toluene) is converted to an aldehyde group using chromyl chloride ($CrO_2Cl_2$) in a solvent like carbon disulfide ($CS_2$).
- Match: (C)-(I)
- (D) Friedel-Crafts Acylation: This reaction introduces an acyl group into an aromatic ring by reacting it with an acyl chloride in the presence of anhydrous aluminum chloride ($AlCl_3$), which acts as a Lewis acid catalyst.
- Match: (D)-(II)