NEET Sample Paper NEET Sample Test Paper-19

  • question_answer 92) The pH of pure water at \[80{}^\circ C\] will be

    A)  =7                             

    B)  < 7

    C)  > 7               

    D)  None of these

    Correct Answer: B

    Solution :

    The dissociation of water is an endothermic reaction therefore \[{{K}_{W}}\](ionization) increases with the increase in temperature. The pH of pure water at \[80{}^\circ C\] de- creases due to the rise in temperature and becomes less than 7 (due to increase in \[{{H}^{+}}\]concentration). Hence, the correct option is [b].

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