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Which of the following cations cannot be detected by the borax bead or microcosmic bead test? — Qualitative and Quantitative Analysis Chemistry Question

Question

Which of the following cations cannot be detected by the borax bead or microcosmic bead test?

Answer: D

💡 Solution & Explanation

Zn2+ forms colourless/white metaborates and orthophosphates, giving a non-diagnostic colourless bead, unlike Cu, Cr, and Fe which give coloured beads.

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