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Question

Place the following gases in order of decreasing rate of diffusion under similar conditions of temperature &pressure: , CO,CO₂, HCI, Cl₂, H₂.

Solution

We know that between two gases, the lighter gas diffuses more quickly than the heavier one. The formula weight of the gases are as follows: CO₂ (44), CO (28), HCI (36.5), Cl₂ (71), H₂ (2). Thus, the order of decreasing rate of diffusion would be: H₂ > CO > HCI > CO₂> Cl₂

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