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Why are halogens coloured ?...

Why are halogens coloured ?

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Why halogens are coloured gases and they are very reactive ? Comment on it.

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What are the interhalogen compounds ? Why are these more reactive than halogens ?

MODERN PUBLICATION-p-BLOCK ELEMENTS-EXERCISE
  1. Compare the acidic strength of HClO4, HClO3, HClO2, HClO. Give reasons...

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  2. Name the Scientist who prepared the first compound of noble gases.

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  3. Why are halogens coloured ?

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  4. What is the oxidation number of central atom K3[Al (C2O4)3]

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  5. Why does concentrated sulphuric acid has high boiling point?

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  6. Fluorine exhibits only - 1 oxidation state whereas other halogens exhi...

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  7. Molecular nitrogen N2 is not particularly reactive. Explain

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  8. What is the oxidation number of central atom [Cu Br2 (H2O) (NH3) ]

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  9. Write the IUPAC name of : [Ag (NH3)2 ]Cl

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  10. Write the IUPAC name of : [Co Cl2 (NH3)4 ]Cl

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  11. What are interhalogen compounds ? Give example.

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  12. Yeast is used in the production of:

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  13. What happens when ammonia reacts with Na.

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  14. What happens when ammonia reacts with CO2.

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  15. Account for the following : NH3 is a stronger base than PH3.

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  16. How would you account for the following : Sulphur has a great tendency...

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  17. Account for the following : Bond energy of F2 is less than Cl2.

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  18. NCl3 is an endothermic compound while NF3 is an exothermic compound. e...

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  19. How would you account for the following : XeF2 is a linear molecule wi...

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  20. How would you account for the following : The electron gain enthalpy w...

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