Question

What is the colour of borax bead in the cation chromium test?

• A. White
• B. Brown white
• C. Green
• D. Blue

Answer 1

The correct option is C Green

Borax bead test is used to identify the metal cation such as $N{i}^{2+},C{o}^{2+},C{r}^{3+},C{u}^{2+},M{n}^{2+}$ etc.
Borax reacts with certain metal salts such as$N{i}^{2+},C{o}^{2+},C{r}^{3+},C{u}^{2+},M{n}^{2+}$ to form colored metaborates. For chromium, it is green in colour.