Give the mechanism of the following reactions: (a) In lead chamber process, NO(g) is used as catalyst in the oxidation of `SO_(2)` to `SO_(3)`. (b) NO(g) catalyses the decomposition ozone to oxygen. (c) Ozone layer depletion by freon or teflon.
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(a) `2NO(g)+O_(2)to underset("Intermediate")(2NO_(2))` `2NO_(2)(g)+2SO_(2)(g)toSO_(2)(g)+2NO(g)` OR `SO_(2)(g)+H_(2)O+NO_(2)(g)tounderset("Intermediate")(H_(2)SNO_(5))` `H_(2)SNO_(5)toH_(2)SO_(4)+NO(g)` (b) `NO(g)+O_(3)(g)toNO_(2)(g)+O_(2)(g)` `O_(3)(g)toO_(2)(g)+O(g)` `NO_(2)(g)+O(g)toNO(g)+O_(2)(g)` `2O_(3)(g)to3O_(3)(g)` (Overall reaction) (c ) Chlorine atoms furnished by fieon and teflon act as a catalyst in the decomposition of ozone in the ozone layer. `O_(3)overset("Sunlight")toO_(2)+[O]` `O_(3)+Cl toO_(2)+OCl` `OCl+OtoCl+O_(2)]`
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OP TANDON-ADSORPTION AND CATALYSIS-SELF ASSESSMENT Section III
