Which of the following catio can not give bead test?

Options

A. `Cr^(3+)`
B. `Co^(2+)`
C. `Ag^(+)`
D. `Mn^(2+)`

Answer

C

Explanation

`Ag^(+)` ion can not give borax bead test because formed silver metaborate `AgBO_(2)` is white/colourless.