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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 11

  • question_answer
    The \[p{{K}_{a}}\]of acetylsalicylic acid (aspirin) is 3.5. The pH of gastric juice in human stomach is about 2-3 and the pH in the small intestine is about 8. Aspirin will be

    A) unionised in the small intestine and in the stomach

    B) completely ionised in the small intestine and in the stomach

    C) ionised in the stomach and almost unionised in the small intestine

    D) ionised in the small intestine and almost unionised in the stomach.

    Correct Answer: D

    Solution :

    [d]: Aspirin a weak acid is unionised in acidic medium due to common ion effect and completely ionised in alkaline medium.


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