P-V diagram of a cyclic process ABCA is as shown in figure. Choose the correct statement

(1) $\Delta Q_{A\to B}$ = negative

(2) $\Delta U_{B\to C}$ = positive

(3) $\Delta W_{CAB}$ = negative

(4) All of these

A sample of an ideal gas is taken through a cycle a shown in figure. It absorbs 50J of energy during the process AB, no heat during BC, rejects 70J during CA. 40J of work is done on the gas during BC. Internal energy of gas at A is 1500J, the internal energy at C would be

(1) 1590 J

(2) 1620 J

(3) 1540 J

(4) 1570 J

In the following P-V diagram two adiabatics cut two isothermals at temperatures T₁ and T₂ (fig.). The value of $\frac{V_a}{V_d}$ will be

(1) $\frac{V_b}{V_c}$

(2) $\frac{V_c}{V_b}$

(3) $\frac{V_d}{V_a}$

(4) V_bV_c

In the following figures, four curves A, B, C and D, are shown. The curves are:

Which of the accompanying PV diagrams best represents an isothermal process ?

(1)

(2)

(3)

(4)

Six moles of an ideal gas perform a cycle shown in figure. If the temperature are T_A = 600 K, T_B = 800 K, T_C = 2200 K and T_D = 1200 K, the work done per cycle is -

(1) 20 kJ

(2) 30 kJ

(3) 40 kJ

(4) 60 kJ

Consider a process shown in the figure. During this process the work done by the system -

(1) Continuously increases

(2) Continuously decreases

(3) First increases, then decreases

(4) First decreases, then increases

The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from A → B → C is 30J and 40J heat is given to the system. The change in internal energy between A and C is

(1) 10 J

(2) 70 J

(3) 84 J

(4) 134 J

An ideal gas is taken from point A to the point B, as shown in the P-V diagram. The work done in the process is -

1. $(P_A-P_B)(V_B-V_A)$

2. $\frac{1}{2}(P_B-P_A)(V_B+V_A)$

3. $\frac{1}{2}(P_B-P_A)(V_B-V_A)$

4. $\frac{1}{2}(P_B+P_A)(V_B-V_A)$

Which one of the following is correct for one complete cycle of a thermodynamic process on a gas as shown in the \((P-V)\) diagram?