Question

A graph is plotted with $\frac{PV}{T}$on y-axis and mass of the gas along x-axis for different gases. The graph is –

• A. A straight line parallel to x-axis for all the gases
• B. A straight line passing through origin with a slope having a constant value for all the gases
• C. A straight line passing through origin with a slope having different values for different gases
• D. A straight line parallel to y-axis for all the gases

Answer 1

Answer: (C)

A straight line passing through origin with a slope having different values for different gases

Answer 2

$\frac{PV}{T}$ = $\frac{M}{RM_{w}}$ So y = $\frac{x}{RM_{w}}$ i.e. $\begin{matrix} y \propto x \end{matrix}$

Straight line having slope m = $\frac{1}{RM_{w}}$

i.e. diff. for diff. gas.