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Equal masses of different gases at the same temperature: which gas exerts the highest pressure

The same question, asked 3 times: 2 May 2023 S1*, 19 Apr 2025 S1*, 23 Apr 2025 S1. Every wording below, oldest first.

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  1. Question 1

    2 May 2023 S1

    65
    Which from following gases of same mass exerts highest pressure at constant temperature?

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  2. Question 2

    19 Apr 2025 S1

    90
    Four vessels of same volume consist equal masses of four gases H2,Cl2, N2H_{2},Cl_{2},{\text{ }N}_{2}, and O2O_{2} separately at same temperature. The pressure exerted by the gas is maximum for

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  3. Question 3

    23 Apr 2025 S1

    81
    A container contains equal masses of H2,HeH_{2},He, CO2CO_{2} and Ne at a certain temperature. Which of the following gas exerts maximum partial pressure?

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