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  4. What is 'X' in the following sequence? Ar.N2Cl xrightarrow[KCN]CuCN Z xrightarrowH.OH Y xrightarrow[Δ] textsoda-limeX

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Q. What is 'X' in the following sequence? $Ar.N_2Cl\xrightarrow[KCN]{CuCN} Z\xrightarrow{H.OH} Y\xrightarrow[{\Delta}]{\text{soda-lime}}X$

JIPMERJIPMER 2004Hydrocarbons

Solution:

The reaction sequence is as follows:
$ArN_2Cl\xrightarrow[{\text{Sandmeyer' s reaction}}]{CuCN/KCN} $
$ArCN\xrightarrow{H.OH}\underset{\text{benzoic acid}}{C_6H_5COOH}$
$\xrightarrow[{\text{decarboxylation}}]{\Delta, \text{sodalime}}\underset{\text{benzene}}{C_6H_6}$