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Which of the following ions would form (...

Which of the following ions would form (i) coloured and (ii) colourless complexes in water?
`Cu^(2+),Zn^(2+),Ti^(3+),Ti^(+4),Cd^(2+),Mn^(2+)`

Text Solution

Verified by Experts

(i) `Ti^(3+), Cu^(2+(3d^(9)) and Mn^(2+)(4d^(10))` have unpaired electron (s). Thus they are coloured due to d-d transitio of electron according to CFT.
(ii) `Zn^(2+)(3d^(10)),Ti^(+4)(3d^(0)) and Cd^(2+)(4d^(10))` do not have unpaired electron(s). thus they do not under go d-d transition of electron accordigng to CFT and, therefore, are colourless.
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RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. E(Mn^(3+)//Mn^(2+))^@is highly positive than that of E(Cr^(3+)//Cr^(2+...

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  2. Use the data to answer the following and also justify giving rason: {:...

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  3. Which of the following ions would form (i) coloured and (ii) colourles...

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  4. Why Ti^(+4) complex are diamagnetic?

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  5. A substance is found to have a magnetic moments of 3.9BM.How many unpa...

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  6. Explain giving reasons: (i) Transition metals and many of their compou...

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  7. Describe The general characteristics of transition elements with speci...

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  8. Which type of reaction MnO(4)^(2-)show with acid , dilute -alkali or w...

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  9. Why is KMnO4 kept in dark bottles ?

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  10. Why does AgNO(3) produced a black stain on the skin?

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  11. Why is AgBr used in photography ?

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  12. Why it is not advisable to dissolve KMnO(4) in cold and concentrated H...

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  13. What happen when: (a) Green Vitriol is strongly heated. , (b) FeSO(4)...

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  14. State true or false: Reaction of K(2)Cr(2)O(7) with cold and concentra...

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  15. Write balanced chemical equations for: (i) Mixture of K(2)Cr(2)O(7) ...

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  16. What are inner transition elements? Decide which of the following atom...

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  17. Actinoid contraction is greater from element to element than lanthanoi...

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  18. The chemistry of the actinoid elements is not so smooth as that of the...

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  19. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions are good reducing agents , but ...

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  20. The transition elements have a general electronic configuration.

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