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Siddharth Srivastava posted an Question
January 15, 2021 • 21:36 pm 30 points
  • IIT JAM
  • Chemistry (CY)

How can we we observe colour in d block ?

how can we we observe colour in d block ? sir , as I know tha t fully filled d orbitals ( or empty d orbitals) in a complex compound means they are colourless. but how can we determine colour in half filled or singly paired electron( unpaired due to one electron ).

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    Priyanshu kumar best-answer

    The colour of transition metal complexes is due to d-d transition...So the metal ion must have unpaired d electrons so that d-d transition occurs and it exhibits colour..But what colour it exhibits this you have to learn either directly or by some trick.. https://youtu.be/9gYZf1eSdVc check this video..it help

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    but in video I seen that there is a difference in colour of Fe3+ that 1) its colour will be yellow when it is in Fecl3 solution . can you explain it , sir?

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    this basically depends on the wavelength range on which the energy falls which inparts colour.Some exceptions you have to keep in mind

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