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)

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?

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

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)

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

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?

During an isobaric expansion of an ideal gas, the work done by the gas is 400 J. If pressure is constant at 2 atm, what is the change in volume? (1 atm = 101325 Pa)

For a diatomic ideal gas undergoing an isothermal process, which quantity remains constant?

Two samples of the same ideal gas at the same temperature have volumes V and 2V respectively. The ratio of their internal energies is:

A heat engine absorbs 1000 J of heat and rejects 600 J to the cold reservoir in one cycle. What is its efficiency?

The entropy change for a reversible isothermal process is given by:

Which process would result in the maximum work output from an ideal gas expansion between two fixed pressures?

A cylinder with a movable piston contains 2 moles of ideal gas at 300 K and 1 atm. When heated at constant pressure to 600 K, what is the work done by the gas? (R = 8.314 J/mol·K)

The molar heat capacity at constant pressure for a diatomic ideal gas is:

A refrigerator operates on a Carnot cycle between -10°C and 30°C. The coefficient of performance (COP) is approximately:

One mole of an ideal monoatomic gas is heated at constant volume from 300 K to 600 K. The change in internal energy is (R = 8.314 J/mol·K):

Two identical blocks of metal at different temperatures are brought into thermal contact in an isolated system. The process is: