In the compound `Yba_(2)Cu_(3)O_(7)` which shows superconductivity, what is the oxidation
Channel: Doubtnut
Date: 12/07/2020

In the compound `Yba_(2)Cu_(3)O_(7)` which shows superconductivity, what is the oxidation state of `Cu` ?  Assume that the rare earth element yttrium is in its usual `+3` oxidation state.