Pressure versus temperature graphs of an ideal gas are as shown in figure. Choose the wrong statement

Options

A. Density of gas is increased in graph (i)
B. Density of gas is decrease in graph (ii)
C. Density of gas is constant in graph (iii)
D. None of these

Answer

C

Explanation

`rho = (PM)/(RT)`
Density `rho` remains constant when `P//T` or volume is increasing at constant temperature hence volume is decreasing so density is increasing. Graphs (ii) and (iii) volume is increasing hence, density is decreasing. Note that volume would had been constant in case the straight line in graph (iii) had passed through origin.