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p-Block Elements - I
hard
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
A
$Cu _3 B _2$
B
$Cu$
C
$Cu \left( BO _2\right)_2$
D
$CuO$
(JEE MAIN-2023)
Solution
Blue green colour is due to formation of $Cu \left( BO _2\right)_2$
$CuSO _4 \stackrel{\Delta}{\longrightarrow} CuO + SO _3$
$CuO + B _2 O _3 \rightarrow Cu \left( BO _2\right)_2$
Standard 11
Chemistry
