Question

Which of the following salts will evolve halogen on treatment with conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ ?
(A) $\mathrm{NaCl}$
(B) KI
(C) $\mathrm{NaBr}$
(D) none of these

Answer 1

mathrm{SO}_{4}[/tex] ?

(A) $\mathrm{NaCl}$

(B) KI

(C) $\mathrm{NaBr}$