Borax bead test is/are given by: (a) \( \mathrm{Co}^{2+} \) (b) \( \mathrm{Zn}^{2+} \) (c) \( \m...

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Borax bead test is/are given by:
(a) \( \mathrm{Co}^{2+} \)
(b) \( \mathrm{Zn}^{2+} \)
(c) \( \mathrm{Cu}^{2+} \)
(d) \( \mathrm{Ni}^{2+} \)
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