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12th Class Chemistry Solutions / विलयन Question Bank MCQs - Solutions

  • question_answer
    Two liquids \[HN{{O}_{3}}\] [A] and water [B] form a maximum boiling azeotrope when mixed in the ratio of 68% and 32% respectively. It means

    A) A - B interactions are stronger than A - A and B - B interactions

    B) A - B interactions are weaker than A - A and B - B interactions

    C) vapour pressure of solution is more than the pure components

    D) vapour pressure of solution is less since only one component vaporises.

    Correct Answer: A

    Solution :

    Since the new interactions (A - B) are stronger than (A - A) and (B - B) interactions, the solution shows negative deviation, i.e., less vapour pressure and hence higher boiling point.


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