NEET Chemistry Redox Reactions Questions Solved


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 [IIT 1994]

(1) 3/7

(2) 7/3

(3) 3

(4) 7

(2) Ba2Cu3  O7 

3+2×2+3x(2×7)=0

3+4+3x14=0

3x=7

x=73.

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