JEE Main & Advanced JEE Main Paper (Held on 08-4-2019 Morning)

  • question_answer
    The lanthanide ion that would show colour is- [JEE Main 8-4-2019 Morning]

    A) \[S{{m}^{3+}}\]

    B) \[L{{a}^{3+}}\]

    C) \[L{{u}^{3+}}\]                             

    D) \[G{{d}^{3+}}\]

    Correct Answer: A

    Solution :

    \[S{{m}^{3+}}(4{{f}^{5}})=\]yellow colour Correct option : (a)                 


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