Solve this:
Q.21. The figure below shows the plot of versus P for oxygen gas at two different temperatures.
Read the following statements concerning the above curves.
(i) The dotted line corresponds to the ideal gas behaviour
(ii)
(iii) the value of at the point where the curves meet on the y-axis is the same for all gases.
Which of the above statements is true
(a) (i) only
(b) (i) and (ii) only
(c) all the above
(d) none of these.
Dear Student , 
Regards
(i) Dotted plot shows that pV/T is a constant quantity ( pV/T = mR) which is independent of pressure .It signifies the ideal gas behaviour.
(ii)As curve at temperature T1 is closer to the dotted plot than the curve at temperature
T2. Since, the behaviour of a real gas approaches the behaviour of perfect gas when temperature is increased, so’
T1 > T2 .
(iii) The value of pV/T , where the curves meet on y-axis is equal to µR
Now, given mass of oxygen gas = 1.00 x 10-3 kg = 1 g
Regards