1.

On performing a borax-bead test with a given inorganic mixture for qualitative analysis, the colour of the bead was found to emerald green both in oxidising and reducing flame. It indicates the possibility of the presence of

Answer»

`Co^(+2)`
`NI^(+2)`
`Cr^(+3)`
`CU^(+2)`

Solution :Chromium ion gives in HOT and COLD OXIDISING and reducing gren-colour flame.


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