NEET Physics - MCQ Practice Questions

A system absorbs 500 J of heat and does 200 J of work on surroundings. What is the change in internal energy?

The entropy of an isolated system can never:

In an isothermal process for an ideal gas, which quantity remains constant?

A Carnot engine operates between temperatures 400 K and 300 K. Its maximum efficiency is:

During an adiabatic expansion of an ideal gas, the internal energy:

The work done by a gas in a cyclic process is:

A heat engine takes 1000 J from hot reservoir and releases 600 J to cold reservoir. Its efficiency is:

For an ideal gas undergoing isobaric process, the relation between volume and temperature is:

The coefficient of performance (COP) of a refrigerator is 5. The work input required to remove 500 J of heat is:

At absolute zero, the entropy of a perfect crystal is:

In an isochoric process, the work done by the gas is:

A reversible engine and an irreversible engine operate between the same two temperatures. Which has greater efficiency?

The heat capacity at constant pressure (Cp) for an ideal gas is greater than at constant volume (Cv) because:

For one mole of ideal gas, Cp - Cv equals:

Two identical gases at different temperatures are mixed adiabatically. The total entropy of the system:

A gas expands from volume V to 2V at constant pressure P. The work done by the gas is:

A substance undergoes a phase transition from solid to liquid at constant temperature and pressure. During this process:

In a throttling process (Joule-Thomson expansion), a real gas undergoes isenthalpic expansion. The temperature change depends on:

A gas undergoes an adiabatic compression. Which statement is correct?

For a cyclic process, which of the following is always true?