Question

Which of the following cations cannot give borax bead test?

• A. $C{r}^{3+}$
• B. $C{o}^{2+}$
• C. $M{n}^{2+}$
• D. $A{g}^{+}$

Answer 1

The correct option is D $A{g}^{+}$

The transition metal cations $C{r}^{3+}$, $C{o}^{2+}$, and $M{n}^{2+}$ all give their characteristic coloured beads with this test. Only $A{g}^{+}$ doesn't give a positive test.