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Metal hydrides are ionic, covalent or ...

Metal hydrides are ionic, covalent or molecular in nature . Among LiH, NaH, KH, RbH, CsH, the correct order of increasing ionic character is

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`LiH lt NaH lt CsH `
LiH is partially covalent in nature and Na is more electronegative than caesium. Hence, CsH possesses the greatest ionic character, while LiH the least.
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ICSE-HYDROGEN-NCERT TEXT-BOOK EXERCISE (With Hints and Solutions)
  1. Saline hydrides are known to react with water violently producing fire...

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  2. Arrange the following: CaH(2), BeH(2) and TiH(2) in order of increa...

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  3. Metal hydrides are ionic, covalent or molecular in nature . Among L...

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  4. Arrange the following: H-H, D-D and F- F in order of increasing bond...

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  5. Arrange the following: NaH, MgH(2) and H(2)O in order of increasing...

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  6. Compare the structures of H(2)O and H(2)O(2).

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  7. What do you understand by the term ’auto-protolysis’ of water? What is...

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  8. Consider the reaction of water with F(2) and suggest, in terms of oxid...

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  9. Complete the following chemical reactions. PbS(s)+H(2)O(2)(aq)to ...

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  10. Complete the following chemical reactions. MnO(4)^(-)(aq)+H(2)O(2)(a...

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  11. Complete the following chemical reactions. CaO(s)+H(2)O(aq)to Clas...

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  12. Complete the following chemical reactions. AlCl(3)(g)+H(2)O(l)to C...

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  13. Complete the following chemical reactions. Ca(3)N(2)(s)+H(2)(l)to ...

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  14. Describe the structure of the common form of ice.

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  15. What causes the temporary and permanent hardness of water ?

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  16. Discuss the principle and method of softening of hard water by synthet...

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  17. Write chemical reactions to show the amphoteric nature of water.

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  18. Write chemical reactions to justify that hydrogen peroxide can functio...

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  19. What is meant by demineralised water?

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  20. Is demineralised or distilled water useful for drinking purposes? If n...

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