Question

Two curves A and B as shown in figure, are graphs for an isothermal and an adiabatic process of an ideal gas.
The isothermal process is represented by the curve

• A. A
• B. B
• C. We can't say
• D. It will be a straight line

Answer 1

The correct option is A A

The slope of $P-V$ curve is more for adiabatic process than for isothermal process.
From the graph it is clear that slope for B is greater than the slope of A.
$\therefore$ Curve A represents isothermal process.