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

  • question_answer
    When electric current is passed through acidified water, 112 mL of hydrogen gas at STP collected at the cathode in 965 seconds. The current passed in amperes is  

    A) 1.0                   

    B) 0.5    

    C) 0.1                   

    D) 2.0

    Correct Answer: A

    Solution :

    [a] \[2{{H}^{+}}+2{{e}^{-}}\xrightarrow{{}}{{H}_{2}}\] \[{{E}_{H}}(Eq.wt)=\frac{2}{2}=1\] \[1g=\frac{22400}{2}=11200\,mL(STP)\] \[Total\text{ }charge\text{ }passed=\frac{96500\times 112}{11200}=965\] \[Q=It=965\] \[I=\frac{965}{965}=1amp.\]


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