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JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Method of expressing concentration of solution

  • question_answer
    \[6.02\times {{10}^{20}}\] molecules of urea are present in 100 ml of its solution. The concentration of urea solution is [AIEEE 2004]

    A)                 0.02 M   

    B)                 0.01 M

    C)                 0.001 M

    D)                 0.1 M (Avogadro constant, \[{{N}_{A}}=6.02\times {{10}^{23}}mo{{l}^{-1}})\]

    Correct Answer: B

    Solution :

               Mole of urea \[=\frac{6.02\times {{10}^{20}}}{6.02\times {{10}^{23}}}={{10}^{-3}}\] moles                         Conc. of solution (in molarity)


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