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Which of the following compound are colo...

Which of the following compound are coloured due to charge transfer spectra ?

A

`K_(2)Cr_(2)O_(7)`

B

`KMnO_(4)`

C

`AgBr`

D

`FeSO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
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Which of the following compounds are coloured due to charge transfer spectra?

Which of the following compounds is(are) coloured due to charge transfer spectra and not due to d - d transitions?

The colours of the transition metal are due to d-d excitation. The energy required for d-d electron axcitation is available in the visible range. Transition metal ions have the tendency to absorb certain rediations from the visible region and exhibit the complementary colour. The transition metal ions which have completely filled d-orbitals are colourless as the excitation of electron or electrons is not possible within d-orbitals. The transition metal ions which have completely empthy d-orbitals are also colourless. In KMnO_4 and K_2Cr_2O_7 , there are no unpaired electrons at the central atom but they are dep in colour. The colour of these compounds is due to charge transfer spectrum. for example in MnO_4 electron is momentrily transferred from O to the metal and thuys oxygen changes from O^(2-) and O^(ɵ) maganese from Mn^(7+) to Mn^(6+) . Q. Which of the following compounds is (are) coloured due to charge transfer spectra and not due to d-d transition?

Which of the following compounds is coloured?

Knowledge Check

  • Which of the following compounds are coloured due to change transfer spectrun ?

    A
    `K_(2)Cr_(2)O_(7)`
    B
    `KMnO_(4)`
    C
    `MnSO_(4)`
    D
    `MnO_(2)`

  • Which of the following compounds is(are) coloured due to charge transfer spectra and not due to d - d transitions?

    A
    `K_(2)Cr_(2)O_(7)`
    B
    `KMnO_(4)`
    C
    `CrO_(3)`
    D
    All of these

  • Which of the following compounds is coloured

    A
    `TiCl_(3)`
    B
    `FeCl_(3)`
    C
    `CoCl_(2)`
    D
    All of these