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  • ABCDEFGH is a hollow cube made of an insulator (figure) face A BCD has a positive charge on it. Inside the cube, we have ionised hydrogen. The usual kinetic theory expression for pressure (a) will be valid

ABCDEFGH is a hollow cube made of an insulator (figure) face ABCD has a positive charge on it. Inside the cube, we have ionised hydrogen.
The usual kinetic theory expression for pressure
(a) will be valid
(b) will not be valid, since the ions would experience forces other than due to collisions with the walls
(c) will not be valid, since collisions with walls would not be elastic
(d) will not be valid because isotropy is lost

 

Answers (1)

The correct answer is the option (b) and (d)

The wall of ABCD is positively charged. The presence of hydrogen ions and the charge on the walls lead to an electrostatic force, which acts in contrast to the collision and makes the kinetic theory of gases invalid in this case. The isotropy also gets lost given the presence of hydrogen ions instead of hydrogen molecules. Hence options b and d are correct.

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