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Generally transition elements and their ...

Generally transition elements and their salts are coloured due to the presence of unpaired electrons in metal ions. Which of the following compounds are coloured?

A

`KMnO_(4)`

B

`Ce(SO_(4))_(2)`

C

`TiCl_(4)`

D

`Cu_(2)Cl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
`KMnO_(4)` is coloured due to the charge transfer and not because of the presence of unpaired electons. Similarly, oxidation state of Ce in `Ce(SO_(4))_(2)` is +4 with `4f^(@)` electronic configuration. It is also coloured (yellow) due to charge transfer and not due to f - f transition.
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NCERT EXEMPLAR-D AND F-BLOCK ELEMENTS-D And F-Block Elements
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  2. Why HCl not used to make the mdeium acidic in oxidation reactions of K...

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  3. Generally transition elements and their salts are coloured due to the ...

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  4. Transition elements show magnetic moment due to spin and orbital motio...

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  5. In the form of dichromate, Cr(VI) is a strong oxidising agent in acidi...

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  6. Which of the following actinoids show oxidation states upto +7?

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  7. General electronic configuration of actinoids is (n-2)f^(1-14)(n-1)d^(...

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  8. Which of the following lanthanoids show +2 oxidation state besides the...

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  9. Which of the following ions show higher spin only magnetic moment va...

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  10. Transition elements form binary compounds with halogens. Which of the ...

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  11. Which of the following will not act as oxidising agents?

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  12. Although +3 is the characteristic oxidation state for lanthanoids but ...

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  13. Why does copper not replace hydrogen from acids?

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  14. Why E^(-) values for Mn, Ni and Zn are more negative than expected?

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  15. Why first ionisation enthalpy of Cr is lower than that of Zn?

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  16. Transition elements show high melting points. Why?

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  17. When Cu^(2+) ion is treated with KI, a white precipitate is formed. Ex...

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  18. Out of Cu(2)Cl(2) and CuCl(2), which is more stable and why?

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  19. When a brown compound of manganese (A) is treated with HCl it gives a ...

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  20. Although fluorine is more electronegative than oxygen, but the ability...

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