NEET Physics - MCQ Practice Questions

An ideal gas undergoes an isothermal expansion from volume V₁ to V₂. If the process is reversible, what is the work done by the gas?

A gas is compressed adiabatically. Which statement is true?

A heat engine absorbs 500 J of heat from a hot reservoir and rejects 300 J to a cold reservoir in one cycle. What is the efficiency of the engine?

For a Carnot engine operating between temperatures T₁ (hot) and T₂ (cold), the maximum efficiency is:

A system absorbs 1000 J of heat and does 600 J of work on the surroundings. What is the change in internal energy?

What is the relationship between Cp and Cv for an ideal gas?

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

A refrigerator operates between 300 K and 250 K. What is the minimum work required to remove 1000 J of heat from the cold reservoir in one cycle?

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:

In a polytropic process PVⁿ = constant. If n = γ, the process is:

The entropy of an isolated system:

Which of the following processes would have the maximum work done by the gas for the same initial and final states?

The standard enthalpy change of reaction ΔH° = -200 kJ/mol. This reaction is:

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:

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

Which of the following is a state function?

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