Which of the following salt has an outcome of blue colour as a result of a borax bead test?

Nickel sulphate

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Cobalt sulphate

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Ferrous sulphate

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Chromium sulphate

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Solution

The correct option is B Cobalt sulphate
Cobalt sulphate on heating gives cobalt oxide and sulphur trioxide, further cobalt oxide is combined with boric anhydride which gives cobalt metaborate which is a blue coloured Bead, the colours of iron, chromium and Nickel are green, green and brown respectively.

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Similar questions

Which of the following ions give blue colour in the borax bead test?

{C o}^{2 +}

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