JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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During the borax bead test with

\mathrm{CuSO}_{4}

, a blue green colour of the bead was observed in oxidising flame due to the formation of

View answer and explanation

Correct option: B

\mathrm{Cu}\left(\mathrm{BO}_{2}\right)_{2}

Option B (

\mathrm{Cu(BO_2)_2}

) is correct because the blue-green color in the oxidizing flame is due to the formation of copper(II) metaborate.

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