The thermodynamic process,in which the internal energy of the system remains constant is ...........

Select the $WRONG$ statement from the following. For an isothermal process:

Can the temperature of a system remain constant even when it is heated? Explain.

Two identical vessels $A$ and $B$ with frictionless pistons contain the same ideal gas at the same temperature and the same volume $V$. The masses of gas in $A$ and $B$ are $m_A$ and $m_B$, respectively. The gases are allowed to expand isothermally to the same final volume $2V$. The changes in pressures of the gas in $A$ and $B$ are found to be $\Delta P$ and $1.5 \Delta P$, respectively. Then

If an ideal gas is compressed isothermally,then:

The specific heat of an isothermal process is: