How is ozone is prepared? How does it react with the following?
(a) PbS (b) KI (c) Hg
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Ozone is prepared in laboratory by passing silent electric discharge through dry oxygen. By passing the electric current some of the oxygen molecules dissociate and then atomic oxygen combines with oxygen molecules to form ozone.
O2---->O+O (endothermic)
O2+O-->O3
3O2------>2O3-energy
(a)PbS+ 4O3 ------>PbSO4 + 4O2
(b) KI +3O3----->KIO3 + 3O2
(c) Hg + O3 ------>Hg2O+O2
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