MCQ
Phenol is obtained by heating aqueous solution of
- AAniline
- ✓Benzene diazonium chloride
- CBenzoic acid
- DNone of these

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the time taken for $75 \%$ reaction of $P$ is twice the time taken for $50 \%$ reaction of $P$. The concentration of $Q$ varies with reaction time as shown in the figure. The overall order of the reaction is


