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Uttarakhand PMT Uttarakhand PMT Solved Paper-2009

  • question_answer
    The pH value of\[1\times {{10}^{-4}}M\text{ }NaOH\]solution is

    A)  4             

    B)  10

    C)  6             

    D)  between 6-7

    Correct Answer: B

    Solution :

     \[1\times {{10}^{-4}}M\,NaOH=1\times {{10}^{-4}}M[O{{H}^{-}}]\] \[pOH=-\log [O{{H}^{-}}]=-\log (1\times {{10}^{-4}})=4\] \[pH=14-pOH=14-4=10\]


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