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JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Osmosis and Osmotic pressure of the solution

  • question_answer
    The solution containing \[4.0gm\] of a polyvinyl chloride polymer in 1 litre of dioxane was found to have an osmotic pressure  \[6.0\times {{10}^{-4}}\] atmosphere at\[300K\],  the value of R used is 0.082 litre atmosphere\[mol{{e}^{-1}}{{k}^{-1}}\]. The molecular mass of the polymer was found to be     [NCERT 1978]

    A)                 \[3.0\times {{10}^{2}}\]   

    B)                 \[1.6\times {{10}^{5}}\]

    C)                 \[5.6\times {{10}^{4}}\]   

    D)                 \[6.4\times {{10}^{2}}\]

    Correct Answer: B

    Solution :

             \[\pi V=\frac{w}{m}\,RT\]                 \ \[6\times {{10}^{-4}}\times 1=\frac{4}{m}\times 0.0821\times 300\] ; \[m=1.64\times {{10}^{5}}\].


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