During the borax bead test with CuSO4, a blue green colour of the bead was observed in oxidising flame due to the formation of (A) Cu3B2 (B) Cu(BO2)2 (C) Cu (D) CuO

Name: JEE Advanced Chemistry
Price: 7999 INR
Availability: InStock

Question

During the borax bead test with CuSO4, a blue green colour of the bead was observed in oxidising flame due to the formation of

(A) Cu3B2
(B) Cu(BO2)2
(C) Cu
(D) CuO

Prashant Kotian · Accepted Answer

Correct answer: B. CuSO4   CuO + SO3 CuO + B2O3  Cu(BO2)2 (Blue-green)

💡 Solution & Explanation