NEET Physics - MCQ Practice Questions

A Carnot engine operates between 300 K and 600 K. Its efficiency is:

Which process has the property that pressure remains constant?

For an isothermal process of an ideal gas, the relationship between pressure and volume is:

A heat engine absorbs 500 J of heat and does 200 J of work. The heat rejected is:

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?

In a Diesel engine, air is compressed adiabatically. If initial temperature is 300 K and compression ratio is 16, the final temperature is approximately (γ=1.4):

A substance has Cp = 30 J/(mol·K) and is heated at constant pressure. The ratio Cp/Cv for this substance is 1.67. What is Cv?

Two identical containers of gas at pressures P₁ and P₂ (P₁ > P₂) and same temperature are connected. After equilibrium, entropy change is:

A real gas shows negative Joule-Thomson coefficient. This means:

For a gas obeying van der Waals equation, internal energy depends on:

The maximum possible efficiency of a heat engine operating between 400 K and 500 K is:

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

A thermodynamic system undergoes a process where ΔU = -50 J and W = 30 J (work done by the system). Calculate the heat absorbed by the system.

Which of the following is a path function?