AIIMS AIIMS Solved Paper-2011

  • question_answer
    The number of sodium atoms in 2 moles of sodium ferrocyanide is

    A)  \[12\times {{10}^{23}}\]       

    B)         \[26\times {{10}^{23}}\]              

    C)  \[34\times {{10}^{23}}\]       

    D)         \[48\times {{10}^{23}}\]

    Correct Answer: D

    Solution :

    Formula of sodium ferrocyanide i.e., \[N{{a}_{4}}[Fe{{(CN)}_{6}}]\] suggests that it has four sodium atoms. Number of Na atoms = number of moles \[\times \] number of atoms per molecule                                              \[\times \] Avogadro number \[=2\times 4\times 6.023\times {{10}^{23}}\] \[=48\times {{10}^{23}}\]


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