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Why are the elements of group 17 general...

Why are the elements of group 17 generally coloured ?

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DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Questions From Board Examinations
  1. How will you prepare the following ? Give chemical equations also. (...

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  2. Why phosphorus is more reactive than nitrogen?

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  3. Why are the elements of group 17 generally coloured ?

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  4. How does nitric acid react with (i) Copper (ii) Iron ? Give chemical e...

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  5. What is the basicity of H(3)PO(3) ?

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  6. What happens when barium azide is heated ?

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  7. How are interhalogen compounds formed ? Write general compositions tha...

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  8. Find the total number of diprotic acids among the following: H(3)PO(...

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  9. Why does NH(3) act as a good complexing agent ?

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  10. Which allotropic form of sulphur is most stable ?

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  11. Why is bond angle in NH(4)^(+) ion higher than in NH(3) ?

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  12. Why is the BiH(3) strongest reducing agent amongst all the hydrides of...

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  13. Which poisonous gas is evolved when white phosphorus is heated with co...

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  14. (i) Which allotrope of phosphorus is more reactive and why ? (ii) Ho...

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  15. Give reason for the following : (i) Chlorine water loses its colour ...

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  16. Draw the structures of (i) H(2)S(2)O(8) (ii) XeO(4).

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  17. On heating copper turnings with conc. HNO(3), a brown coloured gas is ...

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  18. Give reasons : (i) PCl(5) is more volatile than PCl(3). (ii) O-O b...

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  19. Assign reason for the following : (i) H(3)PO(2) is a stronger reduci...

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  20. ON adding NaOH to ammonium sulphate, a colourless gas with pungent odo...

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