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Q.
Borax is heated in a bunsen burner flame with a compound $X$ on a loop of platinum wire. A blue coloured bead of compound $Y$ is formed. Identify $X$ and $Y$
The p-Block Elements
Solution:
The borax bead test can be used to identify transition metals as their metaborates have characteristic colours. When borax is heated in a bunsen burner flame with $CoO (X)$ on a loop of platinum wire, a blue coloured $Co \left( BO _{2}\right)_{2}(Y)$ bead is formed.
Therefore, $X$ and $Y$ are $CoO$ and $Co \left( BO _{2}\right)_{2}$ respectively