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In which of the following ions, the colo...

In which of the following ions, the colour is not due to d-d transition?

A

`[Ti(H_2O)_6]^(3+)`

B

`[Cu(NH_3)_4]^(2+)`

C

`[CoF_6]^(3-)`

D

`CrO_4^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
D
In `CrO_4^(2-)` , Cr is in +6 oxidation state and has do configuration. The colour is due to charge transfer and not due to d-d transition.
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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-COMPETITION FILE (MULTIPLE CHOICE QUESTION ((A) MULTIPLE CHOICE QUESTION WITH ONLY ONE CORRECT ANSWER))
  1. Which of the following has positive M^(2+)(aq) standard reduction elec...

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  2. Which of the following ions has smallest radius?

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  3. In which of the following ions, the colour is not due to d-d transitio...

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  4. When potassium dichromate is heated with potassium hydroxide and the s...

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  5. In a reaction, K2 MnO4 is converted into KMnO4 . The change in the...

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  6. Mn3O4 is a mixed oxide of

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  7. The equivalent weight of KMnO(4) in (a) neutral medium, (b) acidic med...

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  8. Which of the following is an acidic oxide ?

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  9. The number of electrons involve in the equation CrO4^(2-)rarrCr2O7^(2...

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  10. The oxidation state of Cr in Cr(2)O(7)^(2-) is

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  11. In strongly alkaline medium, MnO4^- MnO4^(-) + e^(-) to MnO4^(2-) ...

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  12. In acidic medium, equivalent weight of K(2)Cr(2)O(7) (molecular weight...

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  13. (NH(4))(2)Cr(2)O(7) (ammonium dichromate) is used in fire works. The g...

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  14. The number of moles of KMnO(4) that will be needed to react with one m...

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  15. Number of electrons transferred in each case when KMnO(4) acts as an o...

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  16. The basic character of the transition metal monoxide follows the order

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  17. At pH = 11 , Cr2O7^(2-) ion changes to

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  18. Which of the following is the strongest base ?

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  19. Zr(Z=40) and Hf(Z=72) have similar atomic and ionic radii because of:

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  20. The outer electronic configuration of Gd (At.No. 64) is

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