NEET Physics - MCQ Practice Questions

For a reversible adiabatic process of an ideal gas, which relation holds?

A refrigerator with COP = 4 requires 100 J of work per cycle. Heat removed from the cold reservoir is:

When ice melts at 0°C (273 K) at atmospheric pressure, the entropy change is related to:

A gas expands against a constant external pressure of 1 atm from 1 L to 5 L. The work done by the gas is:

Which of the following is NOT a state function?

The first law of thermodynamics can be written as dU = δQ - δW. The negative sign before W indicates:

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:

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: