Thermodynamic processes I–IV are shown on the P–V diagram. Match Column-I with Column-II. Column-I: (a) Process I; (b) Process II; (c) Process III; (d) Process IV. Column-II: (i) Adiabatic; (ii) Isobaric; (iii) Isochoric; (iv) Isothermal.
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Question

Thermodynamic processes I–IV are shown on the P–V diagram. Match Column-I with Column-II. Column-I: (a) Process I; (b) Process II; (c) Process III; (d) Process IV. Column-II: (i) Adiabatic; (ii) Isobaric; (iii) Isochoric; (iv) Isothermal.

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G1 Physics · Accepted Answer

Step 1: An isochoric P–V curve is vertical (constant V). In the figure, this is process I, so (a)–(iii). Step 2: An adiabatic curve is steeper than an isothermal curve from the same state: process II = adiabatic, so (b)–(i). Step 3: The less steep downward hyperbola represents isothermal expansion: process III, so (c)–(iv). Step 4: A horizontal P–V line denotes constant pressure: process IV = isobaric, so (d)–(ii). Step 5: Mapping is (iii), (i), (iv), (ii). Final answer: (B).