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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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Because of the excitation of non-bonded electrons in halogen molecules by absorbing radiations from visible region of light.
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DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Halogens Family (Group 17)
  1. Draw the structure of BrF(3).

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  2. Assertion : Fluorine is the strongest oxidising agent in halogens. R...

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  3. Which halogen has tendency to form cation ?

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  4. Why do halogens have low melting points ?

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  5. Out of HI and HCl, which is a stronger acid in aqueous solution ?

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  6. Arrange HOCl, HClO(2), HClO(3) and HClO(4) in order of (i) acidic stre...

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  7. Explain the following: (a) More metal fluorides are ionic in nature ...

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  8. Chlorine acts as a bleaching agent only in the presence of

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  9. Give the decreasing order of dipole moments of HF,HCI,HBr, and HI.

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  10. How is chlorine prepared from HCl ? What happens when chlorine is trea...

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  11. Oxidation states of O in OF(2)" and "O(2)F(2) respectively are

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  12. Despite lower value of its electron gain enthalpy with negative sign, ...

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  13. How will you account for the following : (i) HI is a stronger acid t...

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  14. Bond dissociation enthalpy of F-F bond is less than that of Cl-Cl bond...

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  15. Bleaching of flowers by Cl(2) is permanent while bleaching by SO(2) is...

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  16. Why are halogens strong oxidising agents ?

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

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  18. Interhalogen compounds are

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  19. Write the formulae of any two oxyacids of phosphorus.

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  20. Why does chlorine act as a bleaching agnet ?

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