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What happens when Borax is heated strong...

What happens when Borax is heated strongly ?

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Borax on heating strongly decomposes into `NaBO_2` and `B_2O_3` forming a transparent glassy bead.
`Na_2 B_4O_7 . 10H_2O oversetDelta to ubrace(2NaBO_2 +B_2O_3 )_("Transparent glassy bead")+10H_2O`
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VGS PUBLICATION-BRILLIANT-THE P-BLOCK ELEMENTS - GROUP 13 -SHORT ANSWER QUESTIONS
  1. B-Cl bond has a bond moment. Explain why BCl3 molecule has zero dipole...

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  2. Explain the structure of boric acid.

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  3. What happens when Borax is heated strongly ?

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  4. What happens when Boric acid is added to water ?

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  5. What happens when Aluminium is heated with dilute NaOH ?

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  6. What happens when BF3 is treated with ammonia ?

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  7. What happens when Hydrated alumina is treated with aq.NaOH solution ?

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  8. Give reasons Conc. HNO3 can be transported in aluminium container.

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  9. Give reasons A mixture of dil. NaOH and aluminium pieces in used to...

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  10. Give reasons Aluminium alloys are used to make aircraft body

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  11. Give reasons Aluminium utensils should not be kept in water overnigh...

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

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  13. Explain why the electronegativity of Ga, In and Tl will not vary very ...

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  14. Explain borax bead test with a suitable example

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  15. Explain the structure of diborane.

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  16. Explain the reactions of aluminium with acids.

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  17. Write a short note on the anomalous behaviour of boron in the group - ...

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  18. Aluminium reacts with dil. HNO3 but not with conc. HNO3-explain.

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  19. Give two methods of preparation of diborane.

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  20. How does diborane react with H2O ?

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