If a gas expands at constant temperature, it indicates that

Options

A. kinetic energy of molecules decreases
B. pressure of the gas increases
C. kinetic energy of molecules remains the same
D. number of the molecules of gas increases

Answer

C

Explanation

`KE=(3)/(2)RT` (for one mole of a gas)
As, the kinetic energy of a gaseous molecule depends only on temperature, thus at constant temperature, the kinetic energy of the molecules remains the same.