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Standard XII

Chemistry

Reactions of Alkyl Halides

An organic co...

Question

An organic compound $A (C_{6} H_{6} O)$ gives dark green colouration with ferric chloride. On treatment with $C H C l_{3} a n d K O H$ , followed by acidification gives compound $B$ . Compound $B$ can also be obtained from compound $C$ on reaction with pyridinium chlorochromate $(P C C)$ . Identify $A, B a n d C$

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Solution

The correct option is C
Compounds with phenol group gives green colouration with $F e C l_{3}$ .
Hence, compound (A) is phenol.

Phenol on treatment with $C H C l_{3} + A q . N a O H$ followed by hydrolysis gives salicylaldehyde. This reaction is known as Reimer-Tiemann reaction.

PCC will oxidise primary alcohol to aldehyde.

Hence, option (c) is the correct answer.

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An organic compound A (C6H6O) gives dark green colouration with ferric chloride. On treatment with CHCl3 and KOH, followed by acidification gives compound B. Compound B can also be obtained from compound C on reaction with pyridinium chlorochromate (PCC). Identify A, B and C