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When sulphur dioxide is passed through an acidic solution of sodium chlorate. Sodium chlorate oxidises SO 2 to SO 4 2– and itself reduces to form ClO 2 . 2NaClO 3 + SO 2 → 2ClO 2 + Na 2 SO 4

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The p-Block Elements

Short Answer Type

471. How will you prepare hyrogen iodide?

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472. Why HF has abnormally high melting and boiling points?

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473. HF can not be stored in glass bottles. What is the reason for this?

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474. What happens when sulphur dioxide is passed through an acidic solution of sodium chlorate?

When sulphur dioxide is passed through an acidic solution of sodium chlorate. Sodium chlorate oxidises SO₂ to SO₄^2– and itself reduces to form ClO₂.
2NaClO₃ + SO₂→ 2ClO₂+ Na₂SO₄

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475. What is the structure of Cl₂O?

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476. Oxygen is sp³ hybridised in both H₂O and Cl₂O, but in H₂O, the bond angle is 104° while in Cl₂O, the bond angle is 112°. Account for this difference in the value of bond angle.

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