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Write reactions to justify amphoteric na...

Write reactions to justify amphoteric nature of aluminium.

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Aluminium has an amphoteric nature as it reacts with both acids and alkalis. For example,
`2Al(s) + 6HCl(aq) to 2AlCl_3 (aq) + 3H_2 (g) `
`2Al(w) + 2NaOH (aq) + 6H_2 O (l) to underset("Sod. Tetrayddroxoaluminate (III)")(2Na^+ [Al(OH)_4]^(-) (aq) + 3H_2 (g))`
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ICSE-SOME P-BLOCK ELEMENTS -NCERT TEXTBOOK EXERCISES (With Hints and Solutions)
  1. Explain what happens when boric acid is heated .

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  2. Describe the shapes of BF(3)" and "BH(4)^(-). Assign the hybridisation...

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  3. Write reactions to justify amphoteric nature of aluminium.

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  4. What are electron deficient compounds ? Are BCl(3)" and "SiCl(4) elect...

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  5. Write the resonance structures of CO(3)^(2-)" and "HCO(3)^(-).

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

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

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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 : • Lead(...

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  11. Rationalise the given statements and give chemical reactions : • Lead(...

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  12. Rationalise the given statements and give chemical reactions : • Lead(...

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

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  14. If B–Cl bond has a dipole moment, explain why BCl(3) molecule has zer...

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

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

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

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  18. Explain structures of diborane and boric acid.

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  19. What happens when Borax is heated strongly.

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  20. What happens when Boric acid is added to water

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