MHT CET202618 April 2026Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual
Which of the following reactions exhibits the reducing property of ozone ?
Options
- ANO (g) + O ₃ (g) NO ₂ (g) + O ₂ (g)
- B2 KI (aq) + H ₂ O (l) + O ₃ (g) 2 KOH (aq) + I ₂ (g) + O ₂ (g)
- CH ₂ O ₂ (l) + O ₃ (g) H ₂ O (l) + 2 O ₂ (g)
- DPbS (s) + 4 O ₃ (g) PbSO ₄ (s) + 4 O ₂ (g)
Correct answer
C. H ₂ O ₂ (l) + O ₃ (g) H ₂ O (l) + 2 O ₂ (g)
Step-by-step solution
In the reaction NO (g) + O ₃ (g) NO ₂ (g) + O ₂ (g) , nitrogen is oxidized from +2 to +4 . O ₃ acts as an oxidizing agent. In the reaction 2 KI (aq) + H ₂ O (l) + O ₃ (g) 2 KOH (aq) + I ₂ (g) + O ₂ (g) , iodine is oxidized from -1 to 0 . O ₃ acts as an oxidizing agent. In the reaction PbS (s) + 4 O ₃ (g) PbSO ₄ (s) + 4 O ₂ (g) , sulphur is oxidized from -2 to +6 . O ₃ acts as an oxidizing agent. In the reaction H ₂ O ₂ (l) + O ₃ (g) H ₂ O (l) + 2 O ₂ (g) , both hydrogen peroxide and ozone undergo mutual reduction.