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Consider the following observation:
\( \mathrm{M}^{\mathrm{n}+}+\mathrm{HCl} \) (dilute) \( \longrightarrow \) white precipitate \( \stackrel{\Delta}{\longrightarrow} \) water
W
soluble \( \stackrel{\mathrm{CrO}_{4}^{2-}}{\longrightarrow} \) yellow precipitate.
The metal ion \( \mathrm{M}^{\mathrm{n}+} \) will be :
(a) \( \mathrm{Hg}^{2+} \)
(b) \( \mathrm{Ag}^{+} \)
(c) \( \mathrm{Pb}^{2+} \)
(d) \( \mathrm{Sn}^{2+} \)
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