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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

oxygen gives colour to it

B

charge transfer when Mn gives its electron to oxygen

C

charge transfer when oxygen gives its electron to Mn making it Mn(+VI) hence coloured

D

None is correct

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The correct Answer is:
C
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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

The compound in which Mn has oxidation state of +3 is

With F highest stable oxidation state of Mn is

With F highest stable oxidation state of Mn is

With O highest possible oxidation state of Mn is

With O highest possible oxidation state of Mn is

The pink colour of phenolphthalein in alkaline medium is due to

The stable oxidation states of Mn are

Assertion : Solution of Na_(2) CrO_(4) in water is intensely coloured Reason : Oxidation state of Cr in Na_(2) CrO_(4) is + VI .

On oxidation of S_(2)O_(3)^(2-) by MnO_(4)^(-) in neutral aqueous medium, the oxidation state of S would change from :

RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. Spin only magnetic moment of .(25)Mn^(x+)ion is sqrt(15) B.M. Then, t...

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  2. Colour in transition metal compounds in attributed to

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

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  4. The yellow colour of chromates changes to orange on acidification due...

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  5. The catalytic activity of transition metals and their compounds is asc...

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  6. KMnO(4) is the oxo salt of :

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  7. The solubility of silver bromide in hypo solution (excess) is due to ...

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  8. In dilute alkaline solution,MnO(4)^(-) changes to:

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  9. Cl(2) gas is obtained by various reactions but not by:

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  10. The developer used in photography is an alkaline solution of:

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  11. When acidified solution of K(2)Cr(2)O(7) is shaken with aqeous solutio...

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  12. Which of the following compounds is used as the starting material for ...

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  13. CrO(4) dissolves in aqueous NaOH to give :

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  14. The final product obtained for the following reaction is: KMnO(4)("ex...

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  15. The f-block of the periodic table contains those elements in which:

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  16. Among the lanthanides the one obtained by synthetic method is (a)Lu ...

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  17. The most common lanthanoid is

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  18. Across the lanthanide series,the basicity of the lanthanoide hydroxide...

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  19. Actinides

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  20. The lanthanide contraction is responsible for the fact that

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