The reagents, \( \mathrm{NH}_{4} \mathrm{Cl} \) and aqueous \( \mat...

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The reagents, \( \mathrm{NH}_{4} \mathrm{Cl} \) and aqueous \( \mathrm{NH}_{3} \) will precipitate :
(a) \( \mathrm{Ca}^{2+} \)
(b) \( \mathrm{Al}^{3+} \)
(c) \( \mathrm{Mg}^{2+} \)
(d) \( \mathrm{Zn}^{2+} \).
IV
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