Copper Oxidation States in Reactions (Jee Mains)

Transition Elements — General Properties

Medium

Copper Oxidation States in Reactions

Consider the following reactions.
Na₂B₄O₇ $\xrightarrow[{}]{\Delta }$ 2X + Y
CuSO₄ + Y $\xrightarrow[{}]{{{\text {Non - Luminous flame}}}}$ Z + SO₃
2Z + 2X + Carbon $\xrightarrow[{}]{{{\text {Luminous flame}}}}$ 2Q + Na₂B₄O₇ + CO
The oxidation states of Cu in Z and Q, respectively are :

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