The compound formed in the borax-bead test of $C u^{2 +}$ ion in oxidizing flame is:

C u

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C u B O_{2}

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C u {(B O_{2})}_{2}

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none of these

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Solution

The correct option is A $C u {(B O_{2})}_{2}$
The compound formed in the borax-bead test of $C u^{2 +}$ ion in oxidizing flame is $C u {(B O_{2})}_{2}$ . It gives green colour in hot oxidizing flame and blue colour in cold oxidizing flame.

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Similar questions

C u^{2 +}

N a_{2} B_{4} O_{7} Δ \to 2 N a B O_{2} + B_{2} O_{3}

B_{2} O_{3} + C u O \to C u (B O_{2})_{2}

C u (B O_{2})_{2}

C u^{2 +}

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