In the given reaction,identify the reagent A: | vedclass

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(A) The given reaction involves the removal of the diazonium group $(-N_2^+Cl^-)$ from the benzene ring,which is a deamination reaction.The reagent $H

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$H_3PO_2$ and $H_2O$

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(A) The given reaction involves the removal of the diazonium group $(-N_2^+Cl^-)$ from the benzene ring,which is a deamination reaction.The reagent $H_3PO_2$ (hypophosphorous acid) in the presence of water $(H_2O)$ is a standard reducing agent used to replace the diazonium group with a hydrogen atom.Therefore,the conversion of $4-nitro-3-bromobenzenediazonium \ chloride$ to $1-bromo-3-nitrobenzene$ is achieved using $H_3PO_2$ and $H_2O$.

In the given reaction,identify the reagent $A$:
$4-nitro-3-bromobenzenediazonium \ chloride \xrightarrow{A} 1-bromo-3-nitrobenzene$

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In the given reaction,identify the reagent $A$:$4-nitro-3-bromobenzenediazonium \ chloride \xrightarrow{A} 1-bromo-3-nitrobenzene$