Question

The expansion of an ideal gas of mass m at a constant pressure P is given by the straight line D. Then the expansion of the same ideal gas of mass 2m at a pressure P/2 is given by the straight line

(a) E 

(b) C 

(c) B 

(d) A

Answer 1

Correct Option (d) A

Explanation: 

From PV ∝ MT or  V ∝ (M/P)T ; Here  (M/P) represents the slope of curve drawn on volume and temperature

For first condition slope  (M/P) graph is D (given in the problem)

For second condition slope 2M/P/2 =  4(M/P)/ i.e. slope becomes four time so graph A is correct in this condition.