\( \mathrm{BaCl}_{2} \) solution gives a white ppt. with a solution of an acid radical which dis...

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\( \mathrm{BaCl}_{2} \) solution gives a white ppt. with a solution of an acid radical which dissolves in dil. \( \mathrm{HCl} \) with the evolution of a colourless, pungent smelling gas. The acid radical may be ?
(A) \( \mathrm{SO}_{4}^{2-} \)
(B) \( \mathrm{S}^{2-} \)
(C) \( \mathrm{SO}_{3}^{2-} \)
(D) \( \mathrm{CO}_{3}^{2-} \)
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