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(a) How does benzenediazonium chloride r...

(a) How does benzenediazonium chloride react with
(i) Hypophosphorus acid
(ii) Copper cyanide?
(b) Identify A and B in the following reaction sequences:
(i) `C_(6)H_(5)N_(2)Cl underset(Delta)overset(+H_(2)O)to A underset(water)overset(Br_(2))toB`
(ii) `C_(6)H_(5)NH_(2) underst(273-278K)overset(NaNO_(2),HCl)to A overset(CuBr//HB r)toB`

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Identify X, Y and Z in the following reaction : C_(6)H_(5)NH_(2) underset(0-5^(@)C)overset(NaNO_(2)//HCl)(rarr) X underset("Warm")overset(H_(2)O //H^(+))(rarr) Y underset("Heat")overset(Zn)(rarr) Z .

Given the stuctures of A,B and C in the following reactions- (i) C_6H_5N_2^+Cl^(-)overset(CuCN)toAoverset(H_2O //H^+)toBunderset(Delta)overset(H_2O //H^+)toC (ii) C_6H_5NO_2overset(Sn+HCl)toAunderset(273K)overset(NaNO_2+HCl)toBunderset(Delta)overset(H_2O //H^+)toC

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