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Which one of the following oxides of chlorine is obtained by passing dry chlorine over silver chlorate at 90°C?

1. (a) Cl₂O
2. (b) ClO₃
3. (c) ClO₂
4. (d) ClO₄

Correct answer: (c) ClO₂

Solution

Chlorine dioxide (ClO₂) is formed when dry chlorine is passed over silver chlorate (AgClO₃) at 90°C, as this reaction specifically produces ClO₂ gas.

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