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JEE Main & Advanced JEE Main Paper (Held on 09-4-2019 Morning)

  • question_answer
    The osmotic pressure of a dilute solution of an ionic compound XY in water is four times that of a solution of \[0.01\,M\,BaC{{l}_{2}}\]in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of XY (in \[mol\,{{L}^{-1}}\]) in solution is :                         [JEE Main 9-4-2019 Morning]

    A) \[6\times {{10}^{-2}}\]

    B) \[4\times {{10}^{-4}}\]

    C) \[16\times {{10}^{-4}}\]                 

    D) \[4\times {{10}^{-2}}\]

    Correct Answer: A

    Solution :

                \[{{\pi }_{XY}}=4{{\pi }_{BaC{{l}_{2}}}}\]           \[2\times [XY]=4\times 3\times 0.01\] (Assuming same temperature) \[\Rightarrow [XY]=0.06M\] \[\therefore \] Ans. is [a]          


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