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Diborane is an important hydride of Boro...

Diborane is an important hydride of Boron
a. During a class room discussion, a student argues that there is a covalent bond between boron atoms in diborane. What is your opinion. Give justification.
b. Boron halides can act as Lewis acids. Give reason.
c. Arrange the following Lewis acids in the increasing order of acidic strength. Substantiate your answer?
'BF_3 BCl_3, BBr_3'

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Boron halides can act as Lewis acids. Give reason.

Diborane is an important hydride of Boron. During a classroom discussion, a student argues that there is a covalent bond between Boron atoms in diborane. What is your opinion? Give justification.

The substance which can accept electrons is a Lewis acid. 'BCl_3, BF_3' and 'BBr_3' are Lewis acids. a. Arrange the above Lewis acids in the increasing,order of their acid strength. b. Give reason for this order of acidic strength, c. The chemistry of boron is different from that of other members of the same group. Mention any two differences and give reason.

V PUBLICATION-THE p - BLOCK ELEMENTS-QUESTION BANK
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  2. Silianes get easily hydrolysed whereas alkanes do not. Give reasons.

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  3. Diborane is an important hydride of Boron a. During a class room disc...

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  4. Carbon has śeveral allotropic forms. b. Prepare a short note on fulle...

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  5. Why does not silicon form an analogue of graphite? OR Why does element...

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  6. Why carbon forms covalent compounds whereas lead forms ionic compounds...

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  7. Carbon exhibits catenation, whereas silicon does not. Explain.

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  8. SiCl4 forms [SiCl6]^(2-) while C Cl4 does not form [C Cl6]^(2-) Explai...

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  9. when 'CCl4' is mixed with 'H2 O', they become immiscible. Explain.

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  10. The substance which can accept electrons is a Lewis acid. 'BCl3, BF3' ...

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  11. CO2 is a gas but SiO2 is a solid. Give reason.

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  12. Briefly describe the structure of diborane.

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  13. Starting from borax how will you prepare boric acid? (Write the chemic...

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  14. Boron, Aluminium, Gallium, Indium and Thallium belong to group 13 of t...

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  15. Diborane is an important hydride of Boron a. During a class room disc...

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  16. What is dry ice?

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  17. Say TRUE or FALSE. Boron in aqueous solution forms B^(3+) ion.

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  18. How does sodium hydride react with diborảne?

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  19. What is the maximum covalency of silicon in its compounds?

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  20. Account for the following. (i) P b X2 is more stable than P b X4(X=C...

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