Question

A dark green bead in borax bead test indicates the presence of _________.

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

Answer 1

The correct option is A $C{r}^{3+}$

${\text{Cr}}^{3+}\text{gives a dark green color due to the}$

formation of $Cr{\left(B_2\right)}_3$