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In YBa ₂ Cu ₃ O _ 7- x , a superconducting oxide that got George Bednorz and Karl Muller the Nobel prize in 1986, Cu can exist in both +2 and +3 oxidation states and their proportion depends on the value of ' x '. In YBa ₂ Cu ₃ O _ 7-0.5 .

Options

  1. A0.5 moles of Cu are in +3 oxidation state
  2. B5 % of Cu is in +3 oxidation state
  3. CAll the Cu is in +3 oxidation state
  4. DAll Cu is in +2 oxidation state

Correct answer

D. All Cu is in +2 oxidation state

Step-by-step solution

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