\( \mathrm{S}^{2-} \) and \( \mathrm{SO}_{3}^{2-} \) can be disting...

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\( \mathrm{S}^{2-} \) and \( \mathrm{SO}_{3}^{2-} \) can be distinguished by using:
\( \mathrm{P} \)
(a) \( \left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{~Pb} \)
(b) \( \mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NO}\right] \)
(c) \( \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \) solution
(d) \( \mathrm{CaCl}_{2} \)
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