NEET Physics - MCQ Practice Questions

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:

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:

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:

The entropy change of the universe in an irreversible process is:

Three moles of an ideal monatomic gas are heated at constant volume from 300 K to 600 K. The change in internal energy is approximately:

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?