JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Lowering of vapour pressure

  • question_answer
    How many grams of \[C{{H}_{3}}OH\] should be added to water to prepare \[150\,ml\] solution of \[2\,M\,C{{H}_{3}}OH\]          [CBSE PMT 1994]

    A)                 9.6         

    B)                 2.4

    C)                 \[9.6\times {{10}^{3}}\]   

    D)                 \[2.4\times {{10}^{3}}\]

    Correct Answer: A

    Solution :

             1000 ml of \[C{{H}_{3}}OH\] requires methanol = 32 g.            150 ml of 2 M \[C{{H}_{3}}OH\] requires methanol                 \[=\frac{32}{1000}\times 150\times 2=9.6\,g\].             


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