\( \mathrm{K}_{2} \mathrm{CrO}_{4} \) is used for identification of following cations: (a) \( \m...

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\( \mathrm{K}_{2} \mathrm{CrO}_{4} \) is used for identification of following cations:
(a) \( \mathrm{Pb}^{2+} \)
(b) \( \mathrm{Ba}^{2+} \)
(c) \( \mathrm{Ag}^{+} \)
(d) \( \mathrm{Ca}^{2+} \)
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