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Write balanced equations for: BF(3)+LiHt...

Write balanced equations for: `BF_(3)+LiHto`

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Write balanced equations for: B_(2)H_(6)+NH_(3)to

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Write the balanced equations for the reaction of the following compounds with water : (a) Al_(4)C_(3) (b) BF_(3) ( c) CaNCN .

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CBSE COMPLEMENTARY MATERIAL-P-BLOCK ELEMENTS-2-MARK QUESTION
  1. What happens when: Borax is heated strongly

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  2. What happens when: Boric acid is added to water,

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  3. Write balanced equations for: BF(3)+LiHto

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  4. Write balanced equations for:B(2)H(6)+NH(3)to

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

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  6. Suggest reasons why the B–F bond lengths in BF(3) (130 pm) and BF(4 )^...

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  7. Give reason for the following BF(3) act as weak Lewis acid.

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  8. Give reason for the following Boron cannot show covalency more than ...

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  9. How can you explain higher stability of BCI(3) as compared to TICI(3)?

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  10. Give reasons: Aluminium alloys are used to make aircraft body.

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  11. Give reasons: Aluminium wire is used to make transmission cables.

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  12. Describe the shapes of BF(3) and BH(4)^(ө). Assign the hybridisation o...

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  13. Explain the chemistry of borox bead test.

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  14. [SiF(6)]^(2-) is known where as [SiCl(6)]^(2-) not. Reason is

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  15. At room temperature, CO(2) is a gas while SiO(2) is a solid because

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  16. Why is solid carbon dioxide known as dry ice ?

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  17. Elemental silicon does not form a graphtie like structure. Explain.

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  18. Suggest a reason as to why CO is poisonous.

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  19. How is excessive content of CO(2) responsible for global warming?

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  20. What is allotropy ? Name two elements which exhibit allotrophy.

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