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Write reactions to justify the amphoteri...

Write reactions to justify the amphoteric nature of Al.

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V PUBLICATION-THE p - BLOCK ELEMENTS-QUESTION BANK
  1. Explain what happens when boric acid is heated?

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  2. Explain the shapes of BF3 and BH4^-. Assign hybridisation of Boron in ...

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  3. Write reactions to justify the amphoteric nature of Al.

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

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

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

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

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  8. Rationalise the statements and give chemical reactions. (i) Lead (II) ...

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  9. Suggest a reason why B-F bond length in BF3 (130 pm) and BF4^(-) (143 ...

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  10. If 'B-Cl' bond has a dipole moment, explain why 'BCl3' molecule has ze...

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

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  12. Carbon monoxide is highly poisonous. Why?

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  13. Two important oxides of carbon are carbon monoxide and carbon dioxide....

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  14. Borax, orthoboric acid and diborane are some useful compounds of boron...

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  15. What happens when Borax is heated

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  16. Explain the reaction Si is heated with methyl chloride at high tempera...

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  17. Give reasons (vii) Aluminium wire is used to make transmission cables.

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

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  19. How do you explain the lower atomic radius of gallium as compared to a...

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  20. Carbon has many allotropes. Write the name of any two allotropic forms...

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