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NEET Chemistry Solutions / विलयन Question Bank Self Evaluation Test - Solutions

  • question_answer
    The solution containing 4.0 g 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

    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 :

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


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