Question

At low pressure, the graph of $PVvs\frac{1}{V}$ for a given amount at a constant temperature for a real gas is

• A. straight line parallel to x-axis
• B. straight line having positive intercept and negative slope
• C. straight line passing through origin having positive slope
• D. none of the above

Answer 1

The correct option is B straight line having positive intercept and negative slope

At low pressure, the graph of PV vs $\frac{1}{V}$ for a given amount at a constant temperature for a real gas is a straight line having positive intercept and negative slope.
At low pressure, $PV=RT-\frac{a}{V}$
Slope $=-a$
Intercept $=RT$