Redox Reactions And Electrochemistry Ques 365
Question: In the compound $ YBa_2Cu_3O_7 $ which shows superconductivity, what is the oxidation state of cu- Assume the rare earth element yttrium is in its usual +3 oxidation state.
Options:
A) $ +\frac{7}{3} $
B) $ -\frac{7}{3} $
C) $ +\frac{5}{3} $
D) $ -\frac{5}{3} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ (YBa_2Cu_3O_7) $ $ 3+(2\times 2)+3x-14=0 $
$ \therefore x=+\frac{7}{3} $
