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CMC Medical CMC-Medical VELLORE Solved Paper-2013

  • question_answer
    Number of atoms of He in 100 u of He (atomic weight of He = 4u) are

    A)  25                                         

    B)  50

    C)  100                                       

    D)  \[100\times 6\times {{10}^{-23}}\]

    Correct Answer: A

    Solution :

                    \[\therefore \]  \[4u=1\,\text{He}\,\,\text{atom}\] \[1\,u-\frac{1}{4}\text{He}\,\,\text{atom}\] \[\therefore \]  \[100\,u=\frac{1\times 100}{4}=25\,\,\text{atoms}\]


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