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O 3 being endothermic compound readily decomposes on heating to give dioxygen or nascent oxygen. O 3 → O 2 +O (nascent oxygen) since nascent oxygen is very reactive therefore O act as powerful oxidising agent.

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The p-Block Elements

Short Answer Type

391. Why does O₃ act as a powerful oxidising agent?

O₃ being endothermic compound readily decomposes on heating to give dioxygen or nascent oxygen.

O₃ → O₂ +O (nascent oxygen)

since nascent oxygen is very reactive therefore O act as powerful oxidising agent.

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392. How is O₃ estimated quantitatively?

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393. What happens when sulphur dioxide is passed into aqueous solution of Fe (III) salt?

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394. Comment on the nature of two S-O bonds formed in SO₂ molecule. Are the two S-O bonds in this molecule equal?

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395. How is the presence of SO₂ detected?

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396. Mention three areas in which H₂SO₄ plays an important role.

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397. Write the conditions to maximise the yield of H₂SO₄ by contact process.

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398. Why is Ka₂ < < Ka, for H₂SO₄ in water?

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399. Considering the parameters such as bond dissociation enthalpy, electron gain enthalphy and hydration enthalpy compare the oxidising power of F₂ and Cl₂.

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