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Give any two reasons for the formation o...

Give any two reasons for the formation of large number of complex compounds by transition metals.

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(a) The transition metals form a large number of complex compounds. This is because:
(i) Smaller size of metal ions. (ii) High ionic charges.
(iii) Availability of empty d-orbitals for bond formation.
(b) Manganese exhibits highest oxidation states.
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SUBHASH PUBLICATION-THE 'd' - AND 'f' - BLOCK ELEMENTS -Question and Answer
  1. Why Ti^(4+) is colourless where as Cr^(3+) salts are coloured.

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  2. Name the electrode system which have positive E^(0) value in 3d series...

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  3. Give any two reasons for the formation of large number of complex comp...

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  4. Cu^(2+) ions are coloured but Zn^(2+) ions are colourless. Give reason...

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  5. Transition elements shows catalytic property. Give two reason.

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  6. What are interstitial compounds?

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  7. How is potassium dichromate prepared from chromite are ?

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  8. Show that chromates and dichromates are interconvertible.

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  9. Give the structure of chromate ion?

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  10. Give two example to show that potassium dichromate is an oxidising age...

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  11. How is potassium permanganate manufactured from MnO(2) (pyrolusite)?

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  12. Name a compound which is isostructural with KMnO(4).

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  13. What happens when potassium permanganate crystals are heated?

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  14. What is the shape of manganate and permanganate ions? Write structures...

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  15. What is the magnetic nature of manganate and permanganate ions.

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  16. Give four examples to show that acidified KMnO(4) is an oxidising agen...

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  17. What is lanthanoid contraction? Mention the cause for it.

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  18. What is lanthanoid contraction? Write the general oxidation state of a...

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  19. Give two consequences of lanthanoid contraction.

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  20. What happens when lanthanoids are heated in Oxygen

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