Question 136 of 168
Following statements are given
(1) The average kinetic energy of a gas molecule decreases when the temperature is reduced.
(2) The average kinetic energy of a gas molecule increases with increase in pressure at constant temperature.
(3) The average kinetic energy of a gas molecule decreases with increases in volume.
(4) Pressure of a gas increases with increase in temperature at constant volume.
(5) The volume of gas decreases with increase in temperature.
Choose the correct answer from the options given below :
Show answer and solution
Answer: (A) (1) and (4) only
Average kinetic energy of a gas molecule is given by .
Pressure of a gas in terms of rms speed is given by .
As , so is correct, is incorrect, statement can not be said.
Note : Statement (4) is correct only if we consider it at constant volume and not constant pressure. Ideally, this question must be bonus but most appropriate answer is option (A)
Pressure of a gas in terms of rms speed is given by .
As , so is correct, is incorrect, statement can not be said.
Note : Statement (4) is correct only if we consider it at constant volume and not constant pressure. Ideally, this question must be bonus but most appropriate answer is option (A)