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Q.

When phenol is distilled with Zn dust then it gives 

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a

Benzene 

b

Toluene 

c

Benzaldehyde 

d

Benzoic acid

answer is A.

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Detailed Solution

  • When heated with zinc dust, phenol undergoes a reduction process and transforms into benzene.
  •  Initial hydrogen loss will result in the formation of the phenoxide ion. As zinc's electrons are taken up, the hydrogen ion that has generated becomes a hydrogen radical. Later, when the connection between carbon and oxygen breaks, phenyl radical is produced. This radical then reacts with a hydrogen radical to form benzene. 
When phenol is distilled with Zn - dust, it gives:
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