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SF(6) is not easily hydrolysed whereas S...

`SF_(6)` is not easily hydrolysed whereas `SF_(4)` can be. Assign reason.

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In `SF_(4)`, the sulphur atom has `+4` oxidation state and can extend the same to `+6` by accepting electron pairs from `H_(2)O` molecules. Therefore, it can be hydrolysed. But in `SF_(6)`, the oxidation state of sulphur is already `+6` and cannot increase the same any more. Therefore, it cannot be easily hydrolysed. For chemical reaction, consult section 15 (Chemical properties of oxygen family).
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Give reasons for the following observations : Why SF_(4) undergoes hydrolysis but not SF_(6) ? Or SF_(6) is inert towards hydroysis. SF_(6) is much less reactive than SF_(4) . Or (i) SF_(4) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (ii) Sulpher exhibits greater tendency for calenation than selenium. (iii) Sulpher has a higher tendency for catenation than oxygen.

Explain the following situations : (i) In the structure of HNO_(3) molecule , the N-O bond (121 pm) is shorter than N-OH bond (140pm). (ii) SF_(4) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (iii) XeF_(2) has a straight linear structure and not a bent angular structure.

(a) Account for the following observations : (i) SF_(1) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (ii) Chlorine water is a powerful bleaching agent. (iii) Bi (V) is a stronger oxidising agent than Sb(V) (b) What happens when : (i) White phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO_(2). (ii) XeF_(6) undergoes partial hydrolysis. (Give the chemical equations involved).

Account for the following : (i) NH_(3) is a stronger base than PH_(3) (ii) Sulphur has a greater tendency for catention than oxygen. (iii) Bond dissociation energy of F_(2) is less than that of Cl_(2) . (OR) Explain the following situations : (i) In the structure of HNO_(3) moleucle, the N-O bond (121 pm) is shorter than the N-OH bond (140 pm). (ii) SF_(4) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (iii) XeF_(2) has a straight linear structure and not a bent angular structure.

Explain why SF_(4) is easily hydrolysed, whereas SF_(6) is resistant to hydrolysis ?

The shape of SF_(5) can be :

Assertion:- SF_(6) cannot be hydrolysed but SF_(4) can be. Reason:- Six F atoms in SF_(6) prevent the attack of H_(2)O on sulphur atom of SF_(6)

DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Concept Based Questions
  1. H(2)S is a stronger acid than H(2)O. Explain

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  2. Sulphur vapours exhibit some paramagnetic behaviour. Explain.

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  3. SF(6) is not easily hydrolysed whereas SF(4) can be. Assign reason.

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

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  5. Sulphur disappears when boiled with aqueous solution of sodium sulphit...

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  6. Chlorine water has both oxidising as well as bleaching properties ? Ex...

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  7. Oxygen molecule has the formula O(2) while sulphur is S(8). Why ?

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  8. Why is H(2)S less acidic than H(2)Te ?

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  9. Why does burning Mg continue to burn in a jar containing NO but burnin...

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  10. Reducing character decreases from SO(2) " to " TeO(2). Explain.

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  11. Why is iodine more soluble in KI solution than in water ?

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  12. Iodine is liberated in the reaction between KI and CU^(2+) ions but ch...

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  13. Lithium fluroide (LiF) is mainly ionic but lithium iodide (LiI) is cov...

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  14. Interhalogen compounds are more reactive than halogens. Why ?

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  15. ClF(3) exists but FCl(3) does not. Why ?

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  16. Ferric iodide is very unstable but ferric chloride is stable. Explain.

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  17. HF is not stored in glass bottles but is kept in wax bottles. Assign r...

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  18. KHF(2) is a well known compound whereas KHCl(2) does not exist. Why ?

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  19. Fluorine does not show variable oxidation states while other members o...

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  20. Chlorine water has both oxidising as well as bleaching properties prop...

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