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Chemical Properties of Phenols

Benzoquinone ...

Question

Benzoquinone is prepared by reaction of phenol with____________.

N a_{2} C r_{2} O_{7}, H_{2} S O_{4}

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K M n O_{4}, H_{2} S O_{4}

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N a_{2} C r O_{4}, H C l

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K_{2} M n O_{4}, H_{2} S O_{4}

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Solution

The correct option is A $N a_{2} C r_{2} O_{7}, H_{2} S O_{4}$
Phenol to benzoquinone is an oxidation reaction where a strong oxidising agent dichromate in acidified medium is used.
Thus Benzoquinone is prepared by reaction of phenol with $N a_{2} C r_{2} O_{7}, H_{2} S O_{4}$

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Similar questions

F e C r_{2} O_{4}

N a_{2} C O_{3}

7 O_{2}

\to

N a_{2} C r O_{4}

H_{2} S O_{4}

\to

N a_{2} C r_{2} O_{7}

2 K C l

\to

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H I

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(N a_{2} C r_{2} O_{7} +

H_{2} S O_{4})

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N a_{2} C r_{2} O_{7} + 3 S O_{2} + H_{2} S O_{4} \to 3 N a_{2} S O_{4} + C r_{2} (S O_{4})_{3} + H_{2} O

H C l

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2 N a C l + H_{2} S O_{4} \to N a_{2} S O_{4} + 2 H C l

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