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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 26

  • question_answer
    Generally, the first ionization energy increases along a period but there are some exceptions. One which is not an exception is

    A) N and O       

    B) Na and Mg

    C) Mg and Al      

    D) Be and B

    Correct Answer: B

    Solution :

    [b]: Na and Mg is not an exception. The first ionization enthalpy of elements of group 2 are greater than those of group 1 due to their smaller size and higher nuclear charge.


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