Answer the following by appropriately matching the lists based on the information given in the paragraph.
List - I
List - II
(I)
(P)
$PCC, C H_{2} C l_{2}$
(II)
(Q)
$K MnO_{2} /$ $H^{+}$
(III)
(R) Collin's Reagent
(IV)
(S)
$C u$ /300℃

(T) $MnO_{2}, Δ$
Correctly matched away the following is :

Question

Answer the following by appropriately matching the lists based on the information given in the paragraph.

List - I

List - II

(I)

(P)

$PCC, C H_{2} C l_{2}$

(II)

(Q)

$K MnO_{2} /$ $H^{+}$

(III)

(R) Collin's Reagent

(IV)

(S)

$C u$ /300℃

(T) $MnO_{2}, Δ$

Correctly matched away the following is :

TestHub · Accepted Answer

Question Explanation:

Match the specific structural transformations of alcohols to the most appropriate selective reagents.

Concept:

This question is based on Selective Oxidation and Allylic Oxidation.

Solution:

PCC (Pyridinium chlorochromate) and Collin’s reagent are mild oxidising agents.

They oxidise 1° alcohols → aldehydes and 2° alcohols → ketones, without further oxidation.

KMnO₄ /H⁺ and K₂Cr₂O₇ /H⁺ are strong oxidising agents.

They oxidise 1° alcohols → carboxylic acids and 2° alcohols → ketones.

On heating with Cu at 573 K:

1° alcohols → aldehydes,

2° alcohols → ketones,

3° alcohols → alkenes (via dehydration).

Allylic alcohols (II) are selectively oxidized to enones by MnO₂ .

Chemistry - ALCOHOL & ETHER Question with Solution | TestHub