NEET Physics - MCQ Practice Questions

A carnot engine operates between two reservoirs at temperatures 400 K and 300 K. What is its maximum efficiency?

The Gibbs free energy change (ΔG) at equilibrium is:

A heat engine has an efficiency of 40%. If it absorbs 1000 J from the hot reservoir, how much heat is rejected to the cold reservoir?

In a cyclic process, the change in internal energy is:

The standard molar entropy of a substance at 0 K according to the third law of thermodynamics is:

A gas expands isothermally from volume V₁ to V₂. The work done by the gas is W and heat absorbed is Q. What is the relationship between W and Q for an ideal gas?

A reversible heat engine operates between two reservoirs at temperatures T₁ = 400 K and T₂ = 300 K. What is the maximum possible efficiency of this engine?

For a triatomic linear gas molecule, what is the value of Cp - Cv?

A 2 kg block of ice at 0°C is heated until it completely melts. The latent heat of fusion of ice is 3.36 × 10⁵ J/kg. What is the heat required?

An ideal gas at pressure P₁ and volume V₁ undergoes heating at constant volume until pressure becomes P₂. If P₂/P₁ = 2, what is the ratio of final to initial temperature?

When 1000 J of heat is supplied to a system and it does 400 J of work, what is the change in internal energy?

For a spontaneous reaction at 25°C, which condition must be satisfied?

An isolated system undergoes an irreversible process. What happens to its total entropy?