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How is diborane prepared in the laborat...

How is diborane prepared in the laboratory ? Discuss its structure.

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Knowledge Check

  • How is H_2S prepared in laboratory?

    A
    `FeSO_4 + H_2SO_4`
    B
    FeS + dil. `H_2SO_4`
    C
    FeS + conc. `H_2SO_4`
    D
    Elementary `H_2` + elementary S

  • phosphine is generally prepared in the laboratory

    A
    By heating phosphorus in a current of hydrogen
    B
    By heating white phosphorus with aqueous solution of caustic potash
    C
    By decomposition of `P_(2)H_(4)` at `110^(@)C`
    D
    `By heating red phosphorus with an aqueous solution of caustic soda

  • Phosphine is generally prepared in the laboratory

    A
    By heating phosphorus in a current of hydrogen
    B
    By decomposition of `P_(2)H_(4)` at 110
    C
    By heating red phosphorus with an aquesous solution of caustic soda
    D
    By heating white phosphors with caustic potash
    • PRADEEP-SOME p-BLOCK ELEMENTS-ADDITIONAL QUESTIONS (SHORT ANSWER QUESTIONS) I. Group 13 Elements
    1. How are boron trihalides prepared ?

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    2. Discuss the structure of boron trihalides.

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    3. Why do boron trihalides behave as Lewis acids ? Discuss their relati...

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

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    5. Explain the following giving reason : (i) BF(3) acts as a Lewis acid...

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    6. Arrange the boron trihalides in order of increasing Lewis acid chara...

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    7. Comment upon icosahedral structure of boron.

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    8. Why does boron differ from rest of the elements of group ? Give at l...

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    9. Discuss briefly the action of heat or borax.

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    10. Discuss the structure of [B(4)O(5)(OH)(4)]^(2-).

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    11. Explain the chemistry of borox bead test.

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    12. How is boric acid prepared from borax ? Briefly discuss its acidic...

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    13. Discuss the action of heat on boric acid .

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    14. How is borate ion detected in qualitative analysis ?

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    15. Comment upon the structure of boric acid .

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    16. How is diborane prepared in the laboratory ? Discuss its structure.

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    17. How is inorganic benzene prepared ? Why is it called so ?

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    18. Complete and balance the following chemical equations. (i) BF(3) + (...

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    19. Give the composition and uses of the following alloys. (i) Alumini...

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    20. List some uses of boron and its compounds.

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