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

  • question_answer
    When \[100\,\,ml\] of \[M/10\,\,NaOH\] solution and \[50\,\,ml\] of \[M/5\,\,HCl\] solution are mixed, the \[pH\] of resulting solution would be                                         [RPMT 1997]

    A)                 0             

    B)                 7

    C)                 Less than 7         

    D)                 More than 7

    Correct Answer: B

    Solution :

                    100 ml of \[\frac{M}{10}\]NaOH = 50ml of \[\frac{M}{5}\]NaOH. They exactly neutralise 50 ml \[\frac{N}{5}\]HCl. Hence pH of resulting solution = 7.


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