Thermodynamics PYQs Set 17 (PDF)

Set 17 of 17 · Questions 481-484 of 484

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Mere Teacher · Previous Year Questions JEE Main Physics · Thermodynamics · Set 17 (Q481-484)
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481. $One mole of an ideal gas goes from an initial state A to final state B via two processes: It first undergoes isothermal expansion from volume V to 3 V and then its volume is reduced from 3 V to V at constant pressure. The correct P‐V diagram representing the two processes is$ (1) (2) (3) (4) 482. $A car engine has a power of 20 kW . The car makes a roundtrip of 1 hour. If the thermal efficiency of the engine is 40 % and the ambient temperature is 300 K . The energy generated by fuel combustion is$ (1) $180000 kJ$ (2) $240000 kJ$ (3) $360000 kJ$ (4) $270000 kJ$ 483. $Irreversible process is$ (1) $Adiabatic process$ (2) $Joule-Thomson expansion$ (3) $Ideal isothermal process$ (4) $None of the above$ 484. $Match the thermodynamic processes taking place in a system with the correct conditions. In the table: Δ Q is the heat supplied, Δ W is the work done and Δ U is change in internal energy of the system Process? Process Condition (I) Adiabatic (A) Δ W = 0 (II) Isothermal (B) Δ Q = 0 (III) Isochoric (C) Δ U \neq = 0, Δ W \neq = 0, Δ Q \neq = 0 (IV) Isobaric (D) Δ U = 0$ (1) $(I) - (A), (II) - (A), (III) - (B), (IV) - (C)$ (2) $(I) - (B), (II) - (D), (III) - (A), (IV) - (C)$ (3) $(I) - (A), (II) - (B), (III) - (D), (IV) - (D)$ (4) $(I) - (B), (II) - (A), (III) - (D), (IV) - (C)$