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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Hydrogenion concentration pH scale and buffer solution

  • question_answer
    If 4.0 gm \[NaOH\] is present in 1 litre solution, then its \[pH\] will be     [CPMT 1989]

    A)                 6             

    B)                 13

    C)                 18          

    D)                 24

    Correct Answer: B

    Solution :

               \[[NaOH]=0{.4}/{40\,\,{mole}/{l.}\;=0.1\,M}\;\]                                 \[[O{{H}^{-}}]={{10}^{-1}}M\], \[[{{H}^{+}}]={{10}^{-13}}M\],\[pH=13\]


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