Question

The 'set up', used in the laboratory, to collect sulphur dioxide, is that shown in figure (1) I
(2) II
(3) III
(4) IV

Answer 1

The 'set up', used in the laboratory, to collect sulphur dioxide, is SO₂ (g) + H₂O (l) → H₂SO₃ (aq).

Explanation:

• When sulphur dioxide is added to water, the sulphur dioxide gas reacts with the water due to which it gets dissolved in the water following in the rise in the water level in the jar.
• Out of the four setups, there is no presence of water, except in III. If there is no presence of water then how the SO₂ gas will react. Hence, the setup III is correct as SO₂ gets dissolve slowly rising the water level which is collected in the collector.

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