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Explain what happens when boric acid is ...

Explain what happens when boric acid is heated.

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On heating orthoboric acid `((H_(3)BO_(3))` at 370 K or above, it changes to metaboric acid
`(HBO_(2))`. On further heating, this yields boric oxide `B_(2)O_(3)`.
`H_(3)BO_(3)overset(Delta)underset(370K)rarrunderset("Metaboric acid")underset()(HBO_(2))overset(Delta)underset("red hot")rarrunderset("Boric oxide")underset()(B_(2)O_(3))`
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NCERT-THE P-BLOCK ELEMENTS -EXERCISE
  1. Consider the compounds, BCl(3) and C Cl(4).How will they behave with w...

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  2. Is boric acid a protic acid? Explain.

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  3. Explain what happens when boric acid is heated.

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

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  5. Write reaction of justify amphoteric nature of aluminium.

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  6. What are electron-deficient compounds? Are BCl(3) and SiCl(4) electron...

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  7. Write the resonance structure of CO(3)^(2-) and HCO(3)^(ө).

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  8. What is the state of hybridisation of carbon in (a)CO(3)^(2-), (b) dia...

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  9. Explain the difference in properties of diamond and graphite on the ba...

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  10. Rationalise the given statements and give chemical reactions. a. Lea...

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  11. Suggest reasons why the B–F bond lengths in BF(3) (130 pm) and BF(4 )^...

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  12. If B-Cl bond has a dipole moment, explain why BCl(3) molecule has zero...

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  13. AlF(3) is insoluble in anhydrous HF but dissolves on addition of NaF. ...

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  14. Suggest a reason as to why CO is poisonous.

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  15. How is excessive content of CO(2) responsible for global warming?

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  16. Explain structures of diborane and boric acid.

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  17. What happens when (a) Borax is heated strongly, (b) Boric acid is ...

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  18. Explain the following reactions (a) Silicon is heated with methyl ch...

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  19. Give reasons : (i) Conc. HNO(3) can be transported in aluminium con...

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  20. Explain why is there a phenomenal decrease in ionisation enthalpy from...

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