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J & K CET Engineering J and K - CET Engineering Solved Paper-2005

  • question_answer
    The pH of an aqueous solution having hydroxide ion concentration as \[1\times {{10}^{-5}}\] is

    A)  5              

    B)  9

    C)  4.5            

    D)  11

    Correct Answer: B

    Solution :

     \[[O{{H}^{-}}]=1\times {{10}^{-5}}\] \[pOH=-\log [O{{H}^{-}}]\] \[=-\log [1\times {{10}^{-5}}]\] \[pOH=5\] \[pH+pOH=14\] \[pH=14-pOH\] \[14-5\] \[pH=9\]


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