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Predict which of the following will be c...

Predict which of the following will be coloured in aqueous solution ?
`Ti^(3+), V^(3+),Cu^(+),Sc^(3+), Mn^(2+), Fe^(3+), Co^(2+)`.

Text Solution

Verified by Experts

The electronic configuration of cations are listed :
`{:(Sc^(3+)(Z=21)[Ar]^(18),V^(3+)(Z=23)[Ar]^(18)3d^(2)),(Ti^(4+)(Z=22)[Ar]^(18),Mn^(2+)(Z=23)[Ar]^(18)3d^(6)):}`
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DINESH PUBLICATION-D-AND -F BLOCK ELEMENTS-Question From Board Examination
  1. Complete the following equation : CrO(4)^(2-)+H^(+) to

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  2. Give reasons for the following : (i) Mn^(3+) is a good oxidising ag...

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  3. Predict which of the following will be coloured in aqueous solution ? ...

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  4. (a) Explain the structure of dichromate ion. (b) Why are cadmium sa...

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  5. COMPARISON OF LANTHANOIDS & ACTINOIDS

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  6. Explain the following : (i) Cu^(+) is colourless and Cu^(2+) is colo...

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  7. What do you mean by (a) Chromyl Chloride test (b) Actinoids?

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  8. Why do transition metals form coloured complexes ?

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  9. How would you prepare (i) K(2)MnO(4) and MnO(2)? (ii) Na(2)Cr(2)O(7...

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  10. Why is enthalpy of atomisation is the lowest for Zn in 3d series of tr...

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  11. Why is Cr^(2+) reducing and Mn^(3+) oxidising when both have d^4 confi...

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  12. Which of the following actinoids is well known to exhibit +2 oxidation...

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  13. Why do actinoid elements show wide range of oxidation states ?

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  14. Why do the transition elements exhibit higher enthalpies of atomisatio...

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  15. (i) Write an oxidising reaction of K(2)Cr(2)O(7) in the acidic medium....

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  16. Silver atom has completely filled d orbitals (4d^(10)) in its ground s...

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  17. Explain actinoid contraction .

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  18. Why do transition elements show variable oxidation state?

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  19. Explain the following properties of transition elements. (i) Variab...

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  20. Describe the preparation of potassium dichromate from chromite ore. Wh...

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