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

  • question_answer
    If 20 g of a solute was dissolved in 500 ml of water and osmotic pressure of the solution was found to be 600 mm of Hg at \[{{15}^{o}}C,\] then molecular weight of the solute is [BHU 2004]

    A)                 1000      

    B)                 1200

    C)                 1400      

    D)                 1800

    Correct Answer: B

    Solution :

               \[\pi =\frac{n}{V}RT=\frac{m/MRT}{V}\]                                 \[\frac{600}{760}=\frac{20\times 0.0821\times 288\times 1000}{500\times M}\]; \[M=1200\]


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