NEET Sample Paper NEET Sample Test Paper-21

  • question_answer Which one of the following ions exhibits colour in aqueous solution?

    A) \[T{{i}^{4+}}\]                              

    B) \[Z{{n}^{2+}}\]      

    C)   \[N{{i}^{2+}}\]                  

    D)   \[S{{c}^{3+}}\] 

    Correct Answer: C

    Solution :

    \[T{{i}^{4+}},Z{{n}^{2+}},S{{c}^{3+}}\]are not carrying unpaired electrons. But\[N{{i}^{2+}}\]with \[{{d}^{8}},\]electronic configuration carry two unpaired electrons. So it is colored. Hence, the correct option is (c).

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