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Why do transition elements show variable...

Why do transition elements show variable oxidation state?

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The energies `(n-1)d` orbitals and ns orbitals are very close. Hence, electrons from both can participate in bonding.
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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. Why Zinc has lowest melting point in 3d series?

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  2. Why are the ionisation energies of 5d elements greater than 3d element...

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  3. Why do transition elements show variable oxidation state?

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  4. What is the most common oxidation state of first transtion series.?

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  5. Name the three factors which determine the stability of a particular o...

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  6. Why is the E^(Theta) value for the Mn^(3+)//Mn^(2+) couple much postiv...

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  7. {:("Element",Cr,Mn,Fe),(E^(underset(-)(o))(M^(2+)//M),-0.90V,-1.18V,-0...

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

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  9. Why Ti^(+4) complexes are diamagnetic?

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

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  11. Explain giving reason: (a) Transition metals and many of their compo...

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  12. Describe the general characteristics of transition elements with speci...

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  13. Which type of reaction MnO(4)^(2-) shows with aid, dilute-alkali or wa...

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  14. Why KMnO(4) is stored in dark bottle and water happens to it's aidic s...

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  15. Why does AgNO(3) produce a black stain on the skin?

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  16. Why is AgBr used in photography?

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  17. Why it is not advisable KMnO(4) in cold and concentrated H(2)SO(4)?

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  18. What happens when: (a). Green vitriol is strongly heated. (b). Mal...

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

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  20. Write balaned chemical equations for: (i) Mixture of K(2)Cr(2)O(7) a...

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