Which gives blue color in borax bead test? a. Copper b. Cobalt c. Chromium d. None of these
Which gives blue color in borax bead test? a. Copper b. Cobalt c. Chromium d. None of these
Explanation
In the borax bead test, cobalt ions (Co²+) react with borax to form cobalt metaborate (Co(BO2)2), which produces a distinct blue color.