Some Basic Concepts of Chemistry 2 Question 27
27. The compound $\mathrm{YBa}{2} \mathrm{Cu}{3} \mathrm{O}_{7}$, which shows super conductivity, has copper in oxidation state ………. Assume that the rare earth element yttrium is in its usual +3 oxidation state.
$(1994,1 \mathrm{M})$
Integer Answer Type Questions
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Solution:
- If $x$ is the oxidation state of $\mathrm{Cu}$ then :
$3+2 \times 2+3 x+7 \times(-2)=0 \Rightarrow x=\frac{7}{3}$
