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 :
Solution
Blue green colour is due to formation of $\mathrm{Cu}\left(\mathrm{BO}_{2}\right)_{2}$
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$\mathrm{CuSO}_{4} \stackrel{\Delta}{\longrightarrow} \mathrm{CuO}+\mathrm{SO}_{3}$
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$\mathrm{CuO}+\mathrm{B}_{2} \mathrm{O}_{3} \rightarrow \mathrm{Cu}\left(\mathrm{BO}_{2}\right)_{2}$
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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