In which of these diagrams. Density of an ideal gas remains constant?

The density of an ideal gas

The density of the ideal gas is given by

Assertion :- During isothermal expansion of ideal gas, temp, remain constant. Reason :- In adiabatic process temp. remain const.

Total internal energy of an ideal gas remains constant in isothermal process.

Total internal energy of an ideal gas remains constant in isothermal process.