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NEET Chemistry Electrochemistry / विद्युत् रसायन Question Bank Self Evaluation Test - Electrochemistry

  • question_answer
    A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At wt. = 177). The oxidation state of the metal in the metal salt is      

    A) +1                   

    B) +2    

    C) +3                   

    D) +4

    Correct Answer: C

    Solution :

    [c] \[m=\frac{E.wt\times Q}{96500};\] \[\therefore E.\,wt=\frac{m\times 96500}{Q}=\frac{22.2\times 96500}{2\times 5\times 60\times 60}=60.3\] Oxidation state \[=\frac{At\,Wt.}{Eq.\,wt}=\frac{177}{60.3}=3\]


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