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In a metal deficient oxide sample, M X Y 2 O 4 ( M and Y are metals), M is present in both +2 and +3 oxidation states and Y is in +3 oxidation state. If the fraction of M 2+ ions present in M is 1 3 , the value of X is _____.
- 0.25
- 0.33
- 0.67
- 0.75
Correct answer: 0.75
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