O-LevelPhysicsThermal Physics5054/12 · May/June 2024 · Q191 Mark

A transparent box has a dividing wall in its middle. It contains two different gases, one in each half, as shown. [Figure 19.1] The dividing wall is removed. The box is left for a long time. The gases do not react. What is then seen in the box?

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Abrown gas on the right and colourless gas on the left

Bpale brown gas throughout

Cseveral distinct clouds of colourless and brown gas throughout

Dcolourless gas on the right and brown gas on the left

✓ Correct answer

B: pale brown gas throughout

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2024 Paper 1 Variant 2, question 19.

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