JEE Physics - MCQ Practice Questions

For one mole of an ideal monatomic gas, the ratio Cp/Cv is:

In an adiabatic process, if a gas is compressed, which statement is correct?

A carnot engine operates between temperatures 500 K and 300 K. What is its maximum efficiency?

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:

If a reversible process occurs in an isolated system, the entropy of the system:

An ideal gas undergoes a process where PV^n = constant. If n = 1, this process is _____ and if n = γ, this process is _____

Consider a system where entropy decreases by 50 J/K. Which statement must be true?

A polytropic process with polytropic index n = 1.3 is performed on 1 mole of air (diatomic). The work done when volume changes from 1 m³ to 0.5 m³ at initial pressure 100 kPa is:

For a van der Waals gas with equation (P + a/V²m)(Vm - b) = RT, at the critical point, which relationship is valid?

A system absorbs 500 J of heat and performs 200 J of work on the surroundings. What is the change in internal energy of the system?

An ideal gas undergoes an adiabatic process. If the gas is compressed, which of the following is true?

What is the efficiency of a Carnot engine operating between 400 K and 300 K?