2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-82

  • question_answer
    If the last electron (i.e., the differentiating electron) occupies 5f-orbital, the element is said to belong 5f-series. In this series, if ions having \[5{{f}^{0}},\,5{{f}^{7}}\,and\,\,5{{f}^{14}}\] are colourless. The colour of \[{{U}^{3+}}\] is red which is due to

    A)  d-d transition

    B)  f-f transition

    C)  crystal defect

    D)  \[\operatorname{L}\to M\] charge transfer

    Correct Answer: B

    Solution :

    Colour of \[{{U}^{3+}}\] is due to transition of electron from lower electronic energy level of f-orbital to higher electronic energy level of f-orbital. This type of transition is known as f-f transition.


You need to login to perform this action.
You will be redirected in 3 sec spinner