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  • During the borax bead test with , a blue green colour of the bead was observed in oxidising flame due to the

During the borax bead test with CuSO_{4}, a blue green colour of the bead was observed in oxidising flame due to the formation of 

Option: 1

\mathrm{CuO}


Option: 2

\mathrm{Cu}\left(\mathrm{BO}_2\right)_2


Option: 3

\mathrm{Cu}_3 \mathrm{~B}_2


Option: 4

\mathrm{Cu}


Answers (1)

best_answer

Blue green colour is due to formation of \mathrm{Cu}\left(\mathrm{BO}_2\right)_2

\begin{aligned} & \mathrm{CuSO}_4 \stackrel{\Delta}{\longrightarrow} \mathrm{CuO}+\mathrm{SO}_3 \\ & \mathrm{CuO}+\mathrm{B} 2 \mathrm{O}_3 \rightarrow \mathrm{Cu}\left(\mathrm{BO}_2\right)_2 \end{aligned}

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Shailly goel

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