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Which compound can covert phenol back to benzene?

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in Chemistry – Class 12 by (188k points)
Which compound can covert phenol back to benzene?

(a) CrO3

(b) Zinc dust

(c) Pyridine

(d) Strong acid

I had been asked this question by my school principal while I was bunking the class.

Query is from Alcohols and Phenols in portion Alcohols, Phenols and Ethers of Chemistry – Class 12

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Correct choice is (b) Zinc dust

The best I can explain: When heated with zinc dust, the C-O bond in phenol is broken and it is reduced to benzene and zinc oxide.

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