Which of these sulphur compound was obtained by the dry distillation of CuSO₄.5H₂O?

SO₂

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SO₃

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SO₄

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S₂O₄

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Solution

The correct option is B SO₃
In the 18th century, Ibn Zakariya al Razi isolated sulphuric acid by the dry distillation of CuSO₄.5H₂O and FeSO₄.7H₂O. Oxidation of copper sulphate and iron sulphate salts produced sulphur trioxide (SO₃)and oxides of copper and iron respectively.

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