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Given reasons: concentrated nitric acid ...

Given reasons: concentrated nitric acid renders aluminium passive.

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ASSAM ACADEMIC CENTRE-The p-Block Elements-Example
  1. Answer the following: why are PCL5 more covalent than PCl3?

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  2. Answer the following: Why H2O is a liquid whereas H2S is gas at room t...

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  3. Given reasons: concentrated nitric acid renders aluminium passive.

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  4. PH3 has lower boiling point than NH3. Why?

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  5. Give reasons: ozone is more reactive than oxygen why?

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  6. Mention the general characteristics of groups 15 elements with referen...

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  7. Complete the following chemical equations: NaOH(aq) + Cl2(g) rarr (Hot...

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  8. Complete the following equation: XeF6 + H2O rarr.

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  9. Which one has higher electron gain enthalpy with negative sign, sulphu...

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  10. How will you account for the following: NF3 is an exothermic compound ...

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  11. How would you account for the following: CIF3 molecule has a T-shaped ...

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  12. Complete the following reactions: P4 + SO2 CI2 rarr

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  13. Complete the following equations: XeF4 + H2O rarr

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  14. Given reasons: draw the structure of XeOF4.

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  15. Ammonia is a good complexing agent. Why?

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  16. Give reasons for the following: Sulphur vapour is paramagnetic.

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  17. Give reasons for the following: NH3 acts as a Lewis base.

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  18. Negative electron gain ethalpy of fluorine atom is less than that of c...

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  19. Assign reasons for the following: SF6 is much less reactive than SF4.

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  20. Complete the following chemical reaction equations: F2(g) + H2O(l) rar...

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