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J & K CET Medical J & K - CET Medical Solved Paper-2000

  • question_answer
    The first ionization potential of\[Na,Mg,\text{ }Al\]and\[Si\]are in order:

    A)  \[Na<Mg>Al<Si\]

    B)  \[Na>Mg>Al>Si\]

    C)  \[Na<Mg<Al<Si\]

    D)  \[Na>Mg>Al<Si\]

    Correct Answer: A

    Solution :

                    In a period the ionization potential generally increases from left to right but the ionization potential of II A group is higher than III A due to stable electronic configuration. Hence, the order of ionization potential of Na, Mg, Al and Si is as: \[Na<Al<Mg<Si\] or            \[Na<Mg>Al<Si\] (5.1)  (7.6)  (6.0)  (8.1)


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