Which of the following reactions is an example of a redox reaction -

1.	Which of the following reactions is an example of a redox reaction -
Answer» `XeF_(6)+H_(2)OtoXeOF_(4)+2HF` `XeF_(6)+2H_(2)OtoXeO_(2)F_(2)+4HF` `XeF_(4)+O_(2)F_(4)toXeF_(6)+O_(2)` `XeF_(2)+PF_(5)to[XEF]^(+)[PF_(6)]^(-)` Solution :`overset(+6-1)(XeF_(6))+H_(2)overset(-2)Otooverset(+6-2-1)(XeOF_(4))+2HF` `overset(6-1)(XeF_(6))+2H_(2)overset(-2)Otooverset(+6-2-1)(XeO_(2)F_(2))+4HF` `overset(+2-1)(XeF_(2))+overset(+5-1)(PF_(5))tooverset(+2-1)([XeF])overset(+5-1)([PF_(6)])` For the theses reactions ,there is no CHANGE in oxidation NUMBER of the respective elements .So these reactions are not reaction. `overset(+4-1)(XeF_(4))+overset(+4-1)(O_(2)F_(4))tooverset(+6-2)(XeF_(6))+overset(0)O_(2)`This is redox reaction because oxidation number of Xe increases and that of O decreases.

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