NEET Sample Paper NEET Sample Test Paper-21

  • question_answer Which of the following is the correct order of ionic radii?

    A) \[N{{a}^{+}}>M{{g}^{2+}}>A{{l}^{3+}}>S{{i}^{4+}}\]

    B) \[S{{i}^{4+}}<A{{l}^{3+}}>M{{g}^{2+}}>N{{a}^{+}}\]

    C) \[A{{l}^{3+}}<S{{i}^{4+}}>N{{a}^{+}}>M{{g}^{2+}}\]

    D) \[N{{a}^{+}}<M{{g}^{2+}}<A{{l}^{3+}}<s{{i}^{4+}}\] 

    Correct Answer: A

    Solution :

    More the positive charge over the cation the smaller will be the size. Hence, the correct option is (a).


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