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Write reactions to justify amphoteric na...

Write reactions to justify amphoteric nature of Al.

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Al reacts with both acids and alkalis and evolves `H_2` gas. This proves the amphoteric nature of Al.
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CHHAYA PUBLICATION-SOME p-BLOCK ELEMENTS-SOLVED NCERT EXERCISE
  1. Explain what happens when boric acid is heated.

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  2. Describe the shapes of BF3 and BH4^(-) . Assign the hybridisation of b...

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  3. Write reactions to justify amphoteric nature of Al.

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  4. What are electron deficient compounds? Are BCl3 and SiCl4 electron de...

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  5. Write the resonance structures of CO3^(2-) and HCO3^(-).

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  6. What is the state of hybridisation of carbon in CO3^(2-) ?

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  7. What is the state of hybridisation of carbon in diamond ?

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  8. What is the state of hybridisation of carbon in graphite?

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

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  10. Rationalise the statement and give reaction : Lead (II) chloride rea...

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  11. Rationalise the statement and give reaction : Lead (IV) chloride is ...

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  12. Rationalise the statement and give reaction : Lead is known not to f...

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  13. Suggest reasons why the B-F bond lengths in BF3 (130 pm) and BF4^(-) (...

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  14. If B-Cl bond has a dipole moment, explain why BCl3 molecule has zero d...

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  15. Aluminium trifluoride is insoluble in anhydrous HF but dissolves on a...

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

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  17. How does the increase in the amount of CO2 in the atmosphere lead to g...

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  18. Explain structures of diboroane and boric acid.

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  19. What happen when Borax is heated strongly.

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  20. What happens when Boric acid is added to water.

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