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Zn^(2+) salts are colourless while Cu^(2...

`Zn^(2+)` salts are colourless while `Cu^(2+)` salts are coloured. Give reason.

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ASSAM ACADEMIC CENTRE-The d and f-block elements-Example
  1. Write all possible oxidation states of an element having atomic number...

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  2. Write electronic configuration of Cr(24)

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  3. Zn^(2+) salts are colourless while Cu^(2+) salts are coloured. Give re...

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  4. How would you account for the following? Zn, Cd and Hg are normally no...

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  5. Why do transition elements show variable oxidation state?

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  6. Write formula of a compound where the transition metal is in +7 oxidat...

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  7. On what ground can you say that scandium (Z = 21) is a transition elem...

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  8. Explain why E^@ for Mn^(3+)||Mn^(2+) couple is more positive than that...

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  9. Among the ionic species, Sc^(3+), Ce^(4+) and Eu^(2+), which one is a ...

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  10. Why Sm^(2+), Eu^(2+) and Yb^(2+) ions in solutions are good reducing a...

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  11. In the transition series with an increase in atomic number the atomic ...

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  12. Among the lanthanoids, Ce(III) can be easily oxidised to Ce(IV) (Atomi...

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  13. Why is third ionisation enthalpy of manganese exceptionally high?

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  14. Why are all salts of scandium white?

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  15. Why is +2 oxidation state of manganese quite stable while the same is ...

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  16. Name a transition element which does not exhibit variable oxidation st...

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  17. How would you account for the following? The enthalpies of atomization...

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  18. What are transition elements? Give the general electronic configuratio...

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  19. Why is copper considered a transition metal, although it has completel...

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  20. Assign a reason for each of the following: The third ionization enthal...

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