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A solution contains $1 \mathrm{~g}$ mol. each of $\mathrm{p}$ - toluene diazonium chloride and $\mathrm{p}$ - nitrophenyl diazonium chloride. To this 1 $\mathrm{g}$ mol. of alkaline solution of phenol is added. Predict the major product. Explain your answer.
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$p$ - nitrophenyl diazonium chloride reacts preferentially with phenol. The given reaction is an electrophilic aromatic substitution reaction. Phenol in alkaline medium generates electron rich phenoxide ion. Since p-nitrophenyl diazonium chloride is stronger electrophile than p-toluene diazonium cation. Therefore it couples, preferentially with phenol. The reaction is given as follows
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