Question

Following graph is constructed for the fixed amount of the gas.

• A. From $1-2$ pressure will increase
• B. From $1-2$ pressure will decrease
• C. From $2-3$ pressure remains constant
• D. Gas pressure at $3$ is greater then state $2$

Answer 1

Answer: (A), (C)

The correct options are
A From $1-2$ pressure will increase
C From $2-3$ pressure remains constant

$PV=nRT$ ---- ideal gas equation.

(A) From $1$ to $2$, the volume decreases and temperature increases. Hence, the pressure will increase. Thus, the option $A$ is correct and option $B$ is incorrect.

(C) From $2$ to $3$ the ratio of $T$ to $V$ remains constant. Hence, the pressure will remain constant. Thus the option $C$ is correct.