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

At any constant temperature the K.E. of gaseous molecules remains same. `(K.E. prop T)`.
Thus option (c ) is correct answer.