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

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

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  4. What is dry ice?

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

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  6. How does sodium hydride react with diborảne?

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

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

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  9. C O2' can be represented by the structure 'O=C=O' comment.

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  10. Diamond is hard and non conducting while graphite is soft and conducti...

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  11. Give reason for (i) diamond is a covalent compound yet its melting p...

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  12. Give a labouratory method to prepare diaborance and ist some propertie...

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  13. Why would high pressure be an expected condition for the transformatio...

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  14. What are fullerences? How are they prepared?

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  15. Gallium has higher ionisation enthalpy than aluminium. Explain why?

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  16. Borax gets hydrolysed to give

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  17. Orthoboric acid on strong heating to red hot gives. metaboric acid bo...

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  18. The aqueous solution of borax is

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  19. Carborundum is

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  20. The high temperature polymers of silicon are called silicates silicon...

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