JEE Main Chemistry question

Which one of the following is not the correct reaction of aryl diazonium salts? [DCE 2009]

(A)C_6H_5N_2^{+}Cl^{-} + Cu_2Cl_2 \rightarrow C_6H_5Cl
(B)
(C)Correct
(D)C_6H_5N_2^{+}Cl^{-} + SnCl_2/HCl \rightarrow C_6H_5NHNH_2

Answer: (C)

Solution

(a) is the Sandmeyer reaction with cuprous chloride, correctly giving chlorobenzene. (b) is the Balz-Schiemann reaction, correctly giving fluorobenzene on heating the fluoroborate salt. (d) is reduction of the diazonium salt by , correctly giving phenylhydrazine. Hypophosphorous acid

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Question ID VK-150313