Question

The given diagram shows four processes i.e., isochoric, isobaric, isothermal and adiabatic. The correct assignment of the processes, in the same order is given by :

• A. $\text{a d b c}$
• B. $\text{a d c b}$
• C. $\text{d a c b}$
• D.
  $\text{d a b c}$

Answer 1

The correct option is D

$\text{d a b c}$
In isochoric process, volume remain constant. So, its graph will be a straight line parallel to the pressure axis which is $\text{d}$.

In isobaric process, pressure remain constant. So, its graph will be a straight line parallel to the volume axis which is $\text{a}$.

The equation of isothermal process is $PV=\text{constant}$
So, the graph of this process will be a rectangular hyperbola, a second degree curve.

The equation of adiabatic process is $P{V}^{\gamma }=\text{constant}$
So, the graph of this process will be a curve whose degree will be greater than two.

So, the graphs of these processes will be as stated below.

a $\to$ Isobaric, b $\to$ Isothermal, c $\to$ Adiabatic, d $\to$ Isochoric

Hence, $\left(D\right)$ is the correct answer.