Which of the following are correct?

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If the vapour is injected at a uniform rate in a closed vessel which was initially evacuated, then the pressure in the vessel first increases and then becomes constant

A liquid in a closed bottle is continuously decreasing. Then, vapours in the bottle must be unsaturated

As time passes, the amount of liquid in a closed vessel remains constant. So, the vapours in the bottle must be saturated

The pressure of an ideal gas is written as $P = 2 E / 3 V$ . Here, E refers to total kinetic energy.

answer is A, B, C, D.

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Detailed Solution

a) As liquid evaporated it causes vapour pressure & the vapours are unsaturated.
b) equilibrium is attained when saturated vapours developed and no more liquid level decreases.

As we inject a vapour into a closed vessel which is initially evacuated the vapour pressure gradually increases to certain value after that it becomes constant as there establish equilibrium between injected vapour and vapour consisted in vessel.

The pressure of an ideal gas is written as P=2E/3V. Here, E refers to total kinetic energy.

c) & d) are alae correct.

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