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Bond dissociation enthalpy of F-F bond i...

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

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Due to smaller size, the lone pairs of electrons of the F-atoms repel the bond pair of the F-F bond.In contrast, because of comparatively larger size of Cl atoms, the lone pairs on the Cl atoms do not repel the bond pair of Cl-Cl bond.As a result, F-F bond energy is lower than that of Cl-Cl bond energy.
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RESONANCE-P BLOCK ELEMENTS-Exercise 3 part-3
  1. Complete the following reactions equations : (i)Ca(O CI)(2)+HCl to ...

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  2. Noble gases are mostly inert. Assign reasons.

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

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  4. What happen when Cl(2) is passed through a hot concentrated solution o...

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  5. How would you account for the following ? (i)The lower oxidation sta...

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  6. Write chemical equations for the following processes : (i)Chlorine r...

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  7. The negative value of electron gain enthalpy is less for fluorine than...

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  8. Draw the structural formulae of molecules of following compounds : (...

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  9. F(2) is a stronger oxidising agent than Cl(2)

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  10. The majority of noble gas compounds are those of xenon. Explain.

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  11. No chemical compound of helium is known.

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  12. XeF(2) has linear structure and not a bent structure , Given reason .

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  13. Why fluorine never acts as the central atom in polyatomic interhalogen...

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  14. (a) (i) Complete the following chemical equations : (i)NaOH((aq))+...

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  15. Why fluorine does not exhibit any positive oxidation state?

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  16. Explain the following : (a) The electron gain enthalpy with negative...

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  17. Draw the structure of XeF(2) molecule.

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  18. (a)Account for the following : (i)The acidic strength decreases in t...

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  19. (a) what happens when (i) Chlorine gas is passed though a hot conc...

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  20. Explain the following giving an appropriate reason in each case. (i)...

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