BHU PMT BHU PMT (Mains) Solved Paper-2009

  • question_answer
    If No represents Avogadro's number, the number of valence electrons in 4.2 g of nitride ion\[({{N}^{3-}})\]is

    A)  2.4 No                 

    B)  4.2 No

    C)  1.6 No                 

    D)  3.2 No

    Correct Answer: A

    Solution :

                     Number of valence electrons\[=\frac{4.2}{14}\times {{N}_{0}}\times 8\] [\[\because \]Number of valence electrons\[=5+3=8\]] \[=2.4\text{ }{{N}_{0}}\]


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