JEE Physics - MCQ Practice Questions

A gas undergoes an isothermal process at 300 K. If the initial volume is 2 L and final volume is 5 L, what is the work done by the gas? (Take R = 8.314 J/(mol·K), n = 1 mol)

A Carnot engine operates between temperature reservoirs of 500 K and 300 K. What is its maximum efficiency?

In an adiabatic process with a diatomic ideal gas (γ = 1.4), if the initial temperature is 300 K and volume increases by factor of 2, what is the final temperature?

What is the first law of thermodynamics?

A cyclic process consists of two isothermal and two adiabatic processes (Carnot cycle). What is true about the heat exchanges?

For an ideal gas, internal energy depends on:

In an isobaric process, 5 moles of a monoatomic ideal gas are heated from 300 K to 400 K. What is the heat supplied? (R = 8.314 J/(mol·K))

Which process is represented by PVⁿ = constant?

A gas expands isothermally from 1 L to 10 L against a constant external pressure of 1 atm. What is the work done? (1 L·atm = 101.325 J)

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

In an isochoric process for an ideal gas, what is the relationship between pressure and temperature?

A reversible cycle absorbs 100 J at 400 K and rejects heat at 300 K. What is the minimum heat rejected?

Three identical conducting rods are arranged in series between two heat reservoirs at 100°C and 0°C. At steady state, what is the temperature at the junction between the second and third rod?

What is the Clausius statement of the second law of thermodynamics?

A gas undergoes a cyclic process ABCA where AB is isothermal, BC is adiabatic, and CA is isochoric. If work is done on the gas in the cycle, what can be concluded?

For a van der Waals gas, which statement is correct?

In an expansion process, a gas does 500 J of work and absorbs 300 J of heat. What is the change in internal energy?

For a diatomic ideal gas at room temperature, what is the ratio γ = Cₚ/Cᵥ?

Two bodies at temperatures T₁ = 400 K and T₂ = 300 K are brought into thermal contact. If entropy change of universe is 0.575 J/K and heat capacity of both bodies is 1000 J/K, what is the final equilibrium temperature? (Assume no heat loss to surroundings)

A thermodynamic system undergoes a process where internal energy increases by 150 J while the system does 100 J of work on surroundings. What is the heat absorbed by the system?