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Which reagent replaces a diazonium group by -Cl or -Br in the Sandmeyer reaction?
AZnCl2 and HCl
BNaNO2 alone
CDry AlCl3
DCuCl or CuBr
Answer & Solution
Correct answer: D. CuCl or CuBr
Cuprous chloride or bromide supplies the halide and substitutes it for the diazonium group of the aryl diazonium salt.
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