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Q.

Chlorobenzene  reaction X Phenol  reaction Ysalicylaldehyde X and Y reactions are respectively:

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a

Fries rearrangement and Kolbe - schmidt

b

Cumene and Reimer – Tiemann

c

Dow and Reimer – Tiemann

d

Dow and Friedal craft

answer is C.

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Detailed Solution

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Phenol is manufactured by heating chlorobenzene with 10% aqueous NaOH solution at about 623K under 300 atm and in the presence of copper salt acting as a catalyst to form sodium phenoxide. The sodium salt when treated with dil. HCl, gives phenol. This method is known as Dow's process. 

When phenol is heated with CHCl3​ in the presence of aqueous NaOH, an aldehydic group (−CHO) get introduced in the ring at a position ortho to the phenolic group. This reaction is known as the Reimer-Tiemann reaction.

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