Select the correct group(s) of reagent(s) used in the following conversions:

I \Rightarrow d i l . H N O_{3}, I I \Rightarrow N a_{2} C r_{2} O_{7} / H_{2} S O_{4}, I I I \Rightarrow K M n O_{4} / N a O H, I V \Rightarrow P b O_{4} / O^{⊖} H, H_{3} O^{⨁}

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I \Rightarrow d i l H N O_{3}, I I \Rightarrow K M n O_{4} / H^{⨁}, I I I \Rightarrow K M n O_{4} / N a O H, I V \Rightarrow T s C l + a c i d i c K M n O_{4} + H_{2} O

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I \Rightarrow K M n O_{4} / N a O H, I I \Rightarrow N a_{2} C r_{2} O_{7} / H^{⨁}, I I I \Rightarrow K M n O_{4} / O^{⊖} H, I V \Rightarrow d i l . H N O_{3}

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I \Rightarrow C r O_{3} / M e C O O H, I I \Rightarrow K M n O_{4} / O^{⊖} H, I I I \Rightarrow K M n O_{4} / H^{⨁}, I V \Rightarrow d i l . H N O_{3}

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Solution

The correct option is A $I \Rightarrow d i l . H N O_{3}, I I \Rightarrow N a_{2} C r_{2} O_{7} / H_{2} S O_{4}, I I I \Rightarrow K M n O_{4} / N a O H, I V \Rightarrow P b O_{4} / O^{⊖} H, H_{3} O^{⨁}$
Option (A) represents the correct groups of reagents used in the given conversion.

Dilute nitric acid oxidizes methyl group (attached to aromatic ring) to carboxylic group $(- C O O H)$ .
In para nitro toluene, acidified sodium dichromate oxidizes methyl group (attached to aromatic ring) to carboxylic group $(- C O O H)$ .
In ortho chloro toluene, alkaline potassium permanganate oxidizes methyl group (attached to aromatic ring) to carboxylic group $(- C O O H)$ .
In o-cresol, $P b O_{4} / O H^{-}$ followed by acid hydrolysis oxidizes methyl group (attached to aromatic ring) to carboxylic group $(- C O O H)$ .

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Similar questions

The decreasing nucleophilic order of the following compound is:

$(i) Θ C H_{3}$

$(i i) Θ N H_{2}$

$(i i i) Θ O H$

$(i v) Θ F$

The order of -I power (-ve inductive effect ) of the following functional groups will be:

(i) $- S O_{3} H$

(ii) $- C l$

(iii) $- N H_{2}$

(iv) $- H$

C_{6} H_{5} C H_{3} I, C_{6} H_{5} C O O H I I, C_{6} H_{6} I I I, C_{6} H_{5} N O_{2} I V

M n .

M n^{2 +}

M n O_{2}

K M n O_{4}

K_{2} M n O_{4}

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