Imat 2018 Q50 chemistry

hey number 3 doesn’t make any sense, normally with a increase in volume the kinetic energy decreases, why the answer is B? I thought it would be D

The kintetic energy depends on the tempreture.
Pv=nRT, T is the symbol of the tempreture.
With increasing the amount of moles and keeping the pressure and volume constant, the tempreture decreases. So option 1 is wrong.
By increasing the amount of pressure with keeping V and n constant, the tempreture increases. Option 2 is correct.
By increasing the volume and keeping V , n and pressure constant, T increases. So option 3 is correct.
Hope this helps!


Thank you for your clear explanation

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