Question

An ideal gas undergoes a process AB as shown in figure. Which of the following is true for the gas?

• A. pressure (P) decreases
• B. density (d) increases
• C. ratio P/d remains constant
• D. ratio P/d increases

Answer 1

The correct option is D

ratio P/d increases

$P_A<P_B$

Pressure is increasing

$d=\frac{W}{V}$ is decreasing

$PV=nRT$

$PV=\frac{W}{M_0}RT$

$\frac{P}{d}=\frac{RT}{M_0}$

As T is increasing $\frac{P}{d}$ will increase