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

  • question_answer
    The gastric juice in our stomach contains enough \[HCl\] to make the hydrogen ion concentration about \[0.01\,\,mole/litre.\] The \[pH\]of gastric juice is            [NCERT 1974]

    A)                 0.01       

    B)                 1

    C)                 2             

    D)                 14

    Correct Answer: C

    Solution :

               The concentration of \[[{{H}^{+}}]={{10}^{-2}}\]mole/litre                                 \[pH=-\text{log}\,[{{H}^{+}}]\]\[=-\text{log}\,\text{ }\!\![\!\!\text{ 1}{{\text{0}}^{\text{-2}}}]\];\[pH=2\]


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