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(a) What are interstitial compounds ? Wr...

(a) What are interstitial compounds ? Write any one of their characteristics.
(b) Out of the following elements, identify theelement which does not  exhibit variable oxidation state : Cr, Co, Zn.

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(a) Compounds which are formed when small atoms like H,C or N are trapped inside the crystal lattices of metals
Characteristics : High M.P, higher than those of pure metals
Very hard, Retain metallic conductivity and chemically inertness. (
(b) Zn.
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OSWAAL PUBLICATION-D - BLOCK ELEMENTS F - BLOCK ELEMENTS -TOPIC-1 (D - BLOCK ELEMENTS, THEIR PROPERTIES AND COMPONDS) LONG ANSWER TYPE QUESTIONS - I
  1. (a) Transition metals show variable oxidation states. Explain. (b) Whi...

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  2. How is K(2)Cr(2)O(7) manufactured from chromite ore.

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  3. (i) Write the two chemical equations to show the inter conversion of ...

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  4. D-block elements form co-ordination compounds. Give reasons.

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  5. Name the metal of the 1^(st) row transition series that (i) has maxi...

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  6. Write ionic equations for the reaction of dichromate ions with (i) h...

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  7. (a) What are interstitial compounds ? Write any one of their character...

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  8. (a) Which gas is liberated when (i) crystals of potassium permangan...

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  9. Give reason : (i) Most of the transition metals have high melting po...

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  10. (i) What happens when H2S is passed into potassium dichromate in acidi...

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  11. (a) Transition metals and their compounds are used as catalysts. Give ...

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  12. How is potassium permanganate (KMnO(4)) prepared from MnO(2) ? Write t...

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  13. Give reason (one each) for the following: (a) Transition metals are ...

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  14. With reference to the first row transition series: i) Name the metal...

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  15. What may be the stable oxidation state of the transition element with ...

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  16. Explain colour of transition metal compounds based on crystal field sp...

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  17. For M^(2+)//M and M^(3+)//M^(2+) systems the E0 values for some metals...

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

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  19. How would you Account for the following: (i) Of the d^4 species, Cr^...

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  20. Comment on the statement that elements of the first transition series ...

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