NEET Physics - MCQ Practice Questions

In an adiabatic expansion of an ideal gas, the temperature decreases. This is because:

Which process is NOT isobaric (constant pressure)?

The Joule-Thomson coefficient for an ideal gas is:

A gas mixture contains N₂ and O₂. For the mixture, Cv would be:

The entropy of an isolated system:

For a system undergoing a cyclic process, which of the following must be true?

A substance has ΔH_fusion = 6 kJ/mol and melts at 300 K. The entropy change for melting is approximately:

For an adiabatic process of an ideal gas, which relationship is correct?

The molar heat capacity of a gas at constant pressure (Cp) is greater than at constant volume (Cv) because:

Which statement about entropy is correct for an isolated system?

In an isothermal process of an ideal gas, the work done by the gas is:

A gas undergoes compression where both pressure and temperature increase. This process is most likely:

The coefficient of performance (COP) of a refrigerator is 5. If 100 J of work is done on it, how much heat is removed from the cold reservoir?

For a monatomic ideal gas, the ratio Cp/Cv is:

When a substance changes phase from solid to liquid at its melting point at constant temperature and pressure, which is true?

A diatomic gas undergoes free expansion into a vacuum. The entropy of the universe:

For a reaction where ΔH = -200 kJ/mol and ΔS = 50 J/mol·K at 300 K, calculate ΔG:

Two identical gases at the same temperature and pressure occupy different volumes. Which thermodynamic property must be the same for both?

A gas undergoes an adiabatic compression where work done on the gas is 500 J. What is the change in internal energy?

A Carnot refrigerator operates between 250 K and 350 K. If 500 J of heat is removed from the cold reservoir per cycle, what is the work input required?