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What happens when: Borax is heated stron...

What happens when: Borax is heated strongly

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What happens when (a) Borax is heated strongly, (b) Boric acid is added to water, (c) Aluminium is treated with dilute NaOH, (d) BF_(3) is reacted with ammonia ?

(i) What happens when: (a) Borax is heated strongly (b) Boric acid is added to water ( c) Aluminium is treated with dilute NaOH . (d) BF_(3) is reacted with ammonia. (ii) Explain the following reaction. CO is heated with ZnO .

What happens when : (a) Borax is heated strongly. (b) Water is added to aluminium nitride. ( c) Dry chlorine gas is added over not mixture of aluminium and coke. (d) Water is added to aluminium carbide. ( e) Alum is heated. (f) Aluminium is added to copper sulphate solution . (g) Aluminium reacts with HNO_(3) . (h) Excess of Excess of caustic soda is added to a solution aluminium chloride. (i) Aluminium is heated with caustic soda solution. (j) A mixture of borax and cobalt oxide is heated.

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When borax is heated strongly it gives

State with equations what happens when borax is heated on a platinum wire loop and to resulting transparent mass, a mixture amount of CuO is added and the mixture is again heated. (a) First in the oxidising flame and (b) Then in the reducing flame of a Bunsen burner ?

CBSE COMPLEMENTARY MATERIAL-P-BLOCK ELEMENTS-2-MARK QUESTION
  1. Draw the structure of diborane.

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  2. What happens when: Borax is heated strongly

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

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

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

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

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

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

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

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

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

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

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

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  14. Explain the chemistry of borox bead test.

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

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

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

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

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

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

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