Question

When $1.0$L of gas 'A' at $1$ atm and $1.0$L of gas 'B' at $1.01$ atm, are combined in a $2$L vessel, the pressure of the mixture is less than $1.0$atm. This means that?

• A. Molecules of gas 'B' are attracted to themselves more than to the molecules of 'B'
• B. Molecules of gas 'B' are attracted to molecules of 'A' more than themselves.
• C. Molecules of gas 'B' are repelled by molecules of gas 'A'.
• D. There is equal attraction among all of the molecules in the mixture.

Answer 1

The correct option is B Molecules of gas 'B' are attracted to molecules of 'A' more than themselves.
Since the final volume of both the gases is reduced and the initial volume of gas B is more than gas A, hence the molecules of gas B are more attracted to molecules of gas A rather than themselves. Hence option B is correct.