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Why do boron halides act as Lewis acids ...

Why do boron halides act as Lewis acids ?

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The boron atom in a boron halide possesses only 6 electrons in its valence shell. Therefore, they are electron deficient and act as Lewis acids.
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ICSE-SOME P-BLOCK ELEMENTS -SHORT ANSWER TYPE QUESTIONS
  1. What happens when vapour obtained on heating a mixture of boric acid a...

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  2. Explain what happens when boric acid is heated .

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  3. Why do boron halides act as Lewis acids ?

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  4. How is diborane prepared ?

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  5. What is inorganic benzene and how is it obtained?

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  6. Why do boron halides exist as monomeric species?

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  7. Explain giving reasons the following: BF3 is a weaker Lewis acid th...

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  8. Why does the Lewis acid strength of boron halides follow the order B B...

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  9. Why is an aqueous solution of borax slightly alkaline ?

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  10. Why does borax swell up on heating?

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  11. How would you prepare borax from colemanite

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  12. How does carbon occur in nature ?

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  13. Name three crystalline allotropes of carbon.

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  14. What is the hybrid state of carbon in ethyne, graphite and diamond ?

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  15. which of the following is not true about structure of diamond and grap...

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  16. Why is diamond resistant to most of the reagents ?

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  17. Graphite is anisotropic with respect to conduction of electric current...

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  18. Explain why graphite is soft and can be used as a lubricant.

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  19. Explain, why diamond is very hard but graphite is soft .

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  20. How will you account for the following: Graphite is soft and is used...

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