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Q.

The compound YBa2Cu3O7 which shows superconductivity has copper in oxidation state …… Assume that the rare earth element Yttrium is in its usual +3 oxidation state.

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a

3/7

b

7/3

c

3

d

7

answer is B.

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Detailed Solution

YBa2Cu3O73 + 2 (2) + 3x +7(-2) = 0 3 + 4+3x -14 = 0 3x = 7 x = 73

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The compound YBa2Cu3O7 which shows superconductivity has copper in oxidation state …… Assume that the rare earth element Yttrium is in its usual +3 oxidation state.