In which of the following reactions, H₂O₂ acts as a reducing
agent
(a) PbO₂(s) + H₂O₂ (aq) → PbO(s) + H₂O(????) + O₂ (g)
(b) Na₂SO₃ (aq) + H₂O₂(aq) → Na₂SO₄(aq) + H₂O(????)
(c) 2KI(aq) + H₂O₂ (aq) → 2KOH (aq) + I₂(s)
(d) KNO₂(aq) + H₂O₂ (aq) → KNO₃ (aq) + H₂O(????)
Answers
Answered by
0
Answer:
a) as reduction means removal of oxygen and only in first reaction pbo2 is reduced to pbo
Answered by
2
In reaction b and d H₂O₂ acts as oxidising agent.
Explanation:
- An oxidising agent is defined as a reagent in a chemical reaction which oxidises another reagent and itself gets reduced in the process.
- H₂O₂ is the hydrogen peroxide.
- Oxygen in H₂O₂ has the oxidation number of - 1.
- In the 1st reaction, we can see that PbO2 is reduced to PbO and peroxide got oxidised to oxygen.
- In 2nd reaction, we can see that sodium sulphite got oxidized to sodium sulphate and peroxide got reduced to water.
- In 3rd reaction, its not a redox reaction.
- In 4th reaction, potassium nitrite is oxidised to potassium nitrate and peroxide is reduced to water.
- So in 2nd and 4th reaction, peroxide acts as oxidising agent.
For more information about peroxide oxidation,
https://brainly.in/question/5942111
oxidation state of oxygen in peroxide is - Brainly.in
https://brainly.in/question/1631014
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