Q.

By appropriately matching the information given in the three columns of the following table. An ideal gas is undergoing a cyclic thermodynamic process in different ways as shown in the corresponding P–V diagrams in column 3 of the table. Consider only the path from state 1 to state 2. W denotes the corresponding work done on the system. The equations and plots in the table have standard notations as used in thermodynamic processes. Here Y is the ratio of heat capacities at constant pressure and constant volume. The number of moles in the gas is n.                            [2017]

  Column 1   Column 2   Column 3
(I) W12=1γ-1(P2V2-P1V1) (i) Isothermal (P)
(II) W12=-PV2+PV1 (ii) Isochoric (Q)
(III) W12=0 (iii) Isobaric (R)
(IV) W12=-nRTln(V2V1) (iv) Adiabatic (S)

 

Q.    Which one of the following options is the correct combination

1 (IV)(ii)(S)  
2 (III)(ii)(S)  
3 (II)(iv)(P)  
4 (II)(iv)(R)  

Ans.

(2)

Work done in isochoric process is zero for which we get a vertical line in P-V graph, graph(s).