The relative lowering of vapour pressure of a solution containing 6 g of urea dissolved in 90 g of water is

  1. A

    0.0196

  2. B

    O.05

  3. C

    1.50

  4. D

    0.01

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    Solution:

    Wt. of urea=W1=6g

    GMW of urea=M1=60g

    Wt of water=W2=90g

    GMW of water=M2=18g

    According to Raoult’s law.

    R.L.V.P=W1M1×M2W2

    =660×1890

    =150

    =0.02(Near by)

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