JEE Mains · Chemistry · STD 11 -p-Block elements - I
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 \(CuO\)
Answer & Solution
Correct Answer
(C) \(Cu \left( BO _2\right)_2\)
Step-by-step Solution
Detailed explanation
Blue green colour is due to formation of \(Cu \left( BO _2\right)_2\) \(CuSO _4 \stackrel{\Delta}{\longrightarrow} CuO + SO _3\) \(CuO + B _2 O _3 \rightarrow Cu \left( BO _2\right)_2\)
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