NEET Sample Paper NEET Sample Test Paper-39

  • question_answer 47) \[6.02\times {{10}^{20}}\]molecules of urea is present in 100 mL of its solution. The concentration of solution is

    A)  0.01 M       

    B)  0.001 M

    C)  0.1M       

    D)  0.02 M

    Correct Answer: D

    Solution :

     \[6.02\times {{10}^{23}}\]molecules is 1 mole \[6.02\times {{10}^{20}}\]molecules is \[{{10}^{-3}}\]mole 100 mL has \[{{10}^{-3}}\]mole 1000 mL has \[\frac{{{10}^{-3}}}{100}\times 1000={{10}^{-2}}\]

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