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NEET Sample Paper NEET Sample Test Paper-26

  • question_answer
    For 100 times increase in concentration of \[{{H}^{+}}\] ions

    A)  pH increases by 2 units

    B)  pH decreases by 2 units

    C)  pH remains unaltered

    D)  pH decreases by 1 units

    Correct Answer: B

    Solution :

    \[pH=-\log \,\,[{{H}^{+}}]\] \[=-\log \,x\] For 100 times increase in \[[{{H}^{+}}]\]                         \[pH=-\log [100x]\]                                 \[=-\log x-\log 100\]                                 \[=-\log x-2\] i.e. pH decreases by 2 units.


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