⚡Chapter Practice
Thermodynamics — JEE Practice
45 practice questions across 3 topics. Filter by difficulty, solve topic-wise MCQs, and review detailed solutions.
3 Topics45 Questions
Zeroth & First Law(15 Qs)
easy (5)
medium (5)
Q1For an ideal gas in an isothermal process: PV = constant. The work done is:Q2In an adiabatic process for an ideal gas, PVᵞ = constant. The work done is:Q3The slope of an adiabatic curve on a PV diagram compared to an isothermal is:Q4In a cyclic process, the change in internal energy is:Q5One mole of an ideal gas at temperature T has internal energy:
hard (5)
Q1In a polytropic process PVⁿ = const, the specific heat is:Q2An ideal gas undergoes free expansion (into vacuum). After expansion:Q3A monoatomic ideal gas (1 mol) at 300K expands adiabatically to double volume. The final temperature is:Q4The work done by an ideal gas going from state A to B via two different paths:Q5In an adiabatic process, if volume is halved, pressure of a diatomic gas changes by factor:
Second Law & Heat Engines(15 Qs)
easy (5)
medium (5)
Q1The coefficient of performance (COP) of a Carnot refrigerator between T_cold and T_hot is:Q2An engine absorbs 1000 J from hot reservoir and rejects 600 J. Its efficiency is:Q3Which process has the maximum entropy change for heating from T₁ to T₂?Q4Two Carnot engines are in series: first between 600K and 400K, second between 400K and 300K. Combined efficiency:Q5The entropy change when 1 kg of ice at 0°C melts to water at 0°C (L = 3.33 × 10⁵ J/kg) is:
hard (5)
Q1The entropy of mixing two ideal gases (n₁ moles and n₂ moles) initially at same T and P is:Q2A heat engine takes Q₁ at T₁ and rejects Q₂ at T₂. For it to be reversible:Q3An irreversible engine between 800K and 300K absorbs 1000 J. The maximum possible work is:Q4The Clausius inequality states:Q5The entropy change of n moles of ideal gas going from (P₁,V₁,T₁) to (P₂,V₂,T₂) is:
Kinetic Theory of Gases(15 Qs)
easy (5)
medium (5)
hard (5)
Q1The mean free path of an O₂ molecule (d = 3.6 × 10⁻¹⁰ m) at STP is approximately:Q2At high temperatures, a diatomic gas has γ =:Q3The rms speed of H₂ molecules at 300K (M = 2×10⁻³ kg/mol) is:Q4In the Maxwell speed distribution, the fraction of molecules with speed between v and v+dv is proportional to:Q5The pressure of a gas in terms of energy density (E/V) is:
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