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MnO(4)^(-) is of intense pink colour, th...

`MnO_(4)^(-)` is of intense pink colour, though `Mn` is in`(+7)` oxidation state.It is due to:

A

d-d transition

B

charge transfer when Mn gives electron to oxygen

C

charge transfer when oxygen gives tis electrons to Mn making it +VI

D

absorption of IR frequencies

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The correct Answer is:
C
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MnO_(4)^(-) is intense pind colour, though Mn is in (+7) oxidation state. It is due to

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Transition metals usually from coloured complexes and d-d transitions (t_(2g)hArre_(g)) are responsible for colour as the energy difference between t_(2g) and e_(g) lies in visible region. But all the coloured ions are not dut to d-d transition but charge transfer bands also play important roles. Charge transfer bands may be of two types. (i) ligand to metal (CTLM) " "(ii) metal to ligand (CTML). Charge transfer transition always produces intense colour as compared to d-d transition. MnO_(4)^(-) is dark purple coloured though Mn is in (+VII) oxidation state with 3d^(@) configuration

Why KMnO_(4) or MnO_(4)^(-) ion is coloured ?

Pink colour of LiCl crystals is due to:

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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -National Standard Examination In chemistry
  1. The compound with the lowest oxidation state of iron is:

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  2. The aqua ion which will be almost colorless is-

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  3. MnO(4)^(-) is of intense pink colour, though Mn is in(+7) oxidation st...

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  4. The product formed when chlorine gas is passed over hot iron is-

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  5. The highest magnetic moments is shown by the transition metal ion wit...

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  6. The compound in which Mn has oxidation state off +3 is

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  7. Lanthanide contraction is caused due to -

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  8. Which of the following ion is colourless?

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  9. The lanthanide compound which is used as a most powerful liquid laser ...

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  10. Which of the following weighs less when weighed I magnetic field?

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  11. In which of the following compounds, the oxidation number of the start...

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  12. One of the consituents of German silver is

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  13. A mixture of acidified K(2)Cr(2)O(7) and 10% Kl is titrated against a...

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  14. The colourless ion from among the following is

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  15. Bell metal is an alloy of copper and

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  16. Europium (Eu) and Terbium (Tb) attain stable 4f^(7) configuraiton by w...

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  17. The pair of compounds that will not react with each other in an aqueou...

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  18. Four statements for Cr and Mn are given below: (i) Cr^(2+) and Mn^(3...

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  19. The incorrect statement for lanthanides among the following statements...

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  20. Which of the following statements is not true for Ce^(3+) and Yb^(3+)?

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