NEET Physics - MCQ Practice Questions

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?

Two identical gases at the same temperature and pressure occupy different volumes. Which thermodynamic property must be the same for both?

A gas undergoes an adiabatic compression where work done on the gas is 500 J. What is the change in internal energy?

A Carnot refrigerator operates between 250 K and 350 K. If 500 J of heat is removed from the cold reservoir per cycle, what is the work input required?

For an ideal gas undergoing a polytropic process PVⁿ = constant, if n = γ = 1.4, what type of process is this?

A substance has ΔH = -150 kJ/mol and ΔS = -100 J/(mol·K). At what temperature will ΔG = 0?

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?

Three moles of an ideal diatomic gas are heated from 300 K to 600 K at constant pressure. What is the heat absorbed? (R = 8.314 J/(mol·K))

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

A heat engine with 30% efficiency absorbs 5000 J from a hot reservoir. How much heat is rejected to the cold reservoir?

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?

A container of gas at 300 K and 2 atm undergoes isobaric expansion such that its volume doubles. What is the final temperature?

For a substance, ΔH = 100 kJ/mol (endothermic) and ΔS = 200 J/(mol·K) (entropy increase). At low temperatures, is the reaction spontaneous?

A monatomic ideal gas undergoes an isochoric process where its pressure increases from 1 atm to 3 atm. If initial temperature is 300 K, what is the heat absorbed per mole? (R = 8.314 J/(mol·K))

Two reservoirs are at temperatures 400 K and 300 K. A reversible Carnot engine operates between them. If work output is 100 J per cycle, what is the heat input from the hot reservoir?

A diatomic ideal gas expands adiabatically from volume V to 2V. If the initial temperature is 400 K, find the final temperature. (Given: γ = 1.4 for diatomic gas)

A Carnot engine operates between 600 K and 300 K. If it absorbs 1200 J of heat from the hot reservoir, calculate the work done and heat rejected to the cold reservoir respectively.

Five moles of an ideal monatomic gas undergo isothermal expansion at 500 K from 10 L to 50 L. Calculate the change in internal energy and entropy change. (R = 8.314 J/mol·K)

A rigid container holds 3 moles of an ideal diatomic gas at 300 K and 1 atm pressure. The gas is heated until its pressure becomes 2 atm. Calculate the final temperature and the heat supplied to the gas. (Cv for diatomic gas = 5R/2)