JEE Main & Advanced Chemistry Redox Reactions / रेडॉक्स अभिक्रियाएँ Question Bank Mock Test - Redox Reactions

  • question_answer
    In the compound \[YB{{a}_{2}}C{{u}_{3}}{{O}_{7}}\] which shows superconductivity, what is the oxidation state of cu? Assume the rare earth element yttrium is in its usual +3 oxidation state.

    A) \[+\frac{7}{3}\]                       

    B) \[-\frac{7}{3}\]

    C) \[+\frac{5}{3}\]                       

    D) \[-\frac{5}{3}\]

    Correct Answer: A

    Solution :

    [a] \[(YB{{a}_{2}}C{{u}_{3}}{{O}_{7}})\] \[3+(2\times 2)+3x-14=0\] \[\therefore x=+\frac{7}{3}\]


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