When an ideal gas is compressed isothermally then its pressure increase because:

Options

A. its potential energy decreases
B. its kinetic energy increases and molecules move apart
C. its number of collisions per unitl area with walls of container increases
D. molecules energy increases

Answer

C

Explanation

For isothermal, `PV =` constant, `P alpha (1)/(V)`. As area decreases
`:.` number of collision per unit area increases