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Explain that SO2 can act as an oxidising...

Explain that `SO_2` can act as an oxidising agent as well as a reducing agent, but `SO_3` can act as an oxidising agent only.

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The minimum oxidation state (O.S.) of S is -2 while its maximum O.S. +6.
In `SO_2`, the O.S. of S is +4, therefore, it can not only increase its O.S. by losing electrons but can also decrease its O.S. by gaining electrons. As a result, `SO_2` acts both as a reducing agent as well as an oxidising agent.
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BETTER CHOICE PUBLICATION-THE P-BLOCK ELEMENTS-QUESTION BANK
  1. Which form of sulphur shows paramagnetic behaviour and why ?

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  2. Why does sulphur in vapour state exhibit paramagnetic character ?

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  3. Explain that SO2 can act as an oxidising agent as well as a reducing a...

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  4. Explain that SO2 can act as an oxidising agent as well as a reducing a...

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  5. SO2 act as both oxidising and reducing agent but H2S acts as only redu...

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  6. Comment on nature of two S-O bond formed in SO2 molecule. Are the two ...

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  7. SO2 has acidic character. Explain.

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  8. Write the reaction of SO2 with Cl2

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  9. Write the reaction of SO2 with Cl2

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  10. Give the oxidation of Na2SO3 by acidified KMnO4.

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  11. Give the formula and structures of different oxo-acids of sulphur ?

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  12. Describe the manufacture of H2SO4 by contact process?

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  13. Explain the manufacture of sulphuric acid by contact process.

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  14. Write the conditions for maximum yield of H2SO4 by contact process.

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  15. Give an example of a reaction in which H2 SO4 behaves as a strong acid...

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  16. Give an example of a reaction in which H2 SO4 behaves as a dehydrating...

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  17. Give an example of a reaction in which H2 SO4 behaves as an oxidising ...

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  18. Describe the commerical uses of sulphuric acid.

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  19. Mention three areas in which H2SO4 plays an important role.

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  20. Why conc. H2 SO4 is viscous and has high boiling point ?

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