Elements of Groups 16, 17 and 18 — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryElements of Groups 16, 17 and 182 Marks
Question
Give one example showing reducing property of ozone.
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Answer
Ozone decomposes to liberate nascent oxygen, hence it is a powerful oxidising agent. $O _{3(g)} \rightarrow O _{2(g)}+$ OFor example
(i) It oxidises lead sulphide ( PbS ) to lead sulphate $\left( PbSO _4\right)$.
$pbS_{(s)}+4 O_{3(g)} \rightarrow PbSO_{(s)}+4 O_{2(g)}$
(ii) Potassium iodide, Kl is oxidised to iodine, $I _2$ in the solution.
$2 Kl_{(aq)}+H_2 O_{(1)}+O_{3(g)} \rightarrow 2 KOH_{(aq)}+I_{2(s)}+O_{2(g)}$
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