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What are methanides? Whichg as do they l...

What are methanides? Whichg as do they liberate on hydrolysis?

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These are the carbides having `C^(-)` ion e.g., aluminius carbide. When hydrolysed, they liberate methane gas.
`Al_(4)C_(3)+12H_(2)Orarr4Al(OH)_(3)+3CH_(4)`
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DINESH PUBLICATION-P BLOCK ELEMENTS (GROUP 13 AND 14 )-Concept based
  1. Stannous chloride and ferric chloride cannot be kept in the same cont...

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  2. How is lithium aluminium hydride prepared? What is its important use?

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  3. What are methanides? Whichg as do they liberate on hydrolysis?

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  4. Why is+2oxidiation state of lead more stable than +4 oxidation state?

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  5. Diagonal Relationship Between Beryllium And Aluminium

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  6. White fumes appear around the bottle of anhydrous aluminium chloride. ...

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  7. Boron is unable to form BF(6)^(3-)– ion. Explain.

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  8. Why is boric acid considered as a weak acid ?

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  9. In elements of group 14. (a) which forms the most acidic oxide (b)...

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  10. [SiF(6)]^(2-) is a well known compound but [SiCl(6)[^(2-) is not. Expl...

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  11. Diamond is covalent, yet it has high melting point. Why ?

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  12. What are alums? Give the chemcial formulae of the following alums:

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  13. Which importan t properties of aluminium are responsible for its great...

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  14. Account for the foolowing: (a) Aluminium is not prepared by carrying...

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  15. Carbon does not form any complesses while slicon particlipates in the ...

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  16. Why is SnCl(2) more easly formed than SnCl(4)?

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  17. PbCl(4) exists but PbBr(4) and PbI(4) do not because of

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  18. Point out the false statements in the following: (a) Lead shows allo...

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  19. (a) Why is boric acid considered as a weak acid. (b) Discuss the str...

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  20. Write the reactions of B(2)H(6) with (a) H(2)O (b) O(2) (c) NH(3).

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