Three samples of the same gas A, B and C (γ = 3/2) have initially equal volume. Now the volume of each sample in doubled. The process is adiabatic for A isobaric for B and isothermal for C. If the final pressures are equal for all three samples, the ratio of their initial pressures are
A
2 
: 2 : 1
: 2 : 1
B
2 
: 1 : 2
: 1 : 2
C
: 1 : 2
D
2 : 1 : 
Text Solution
Verified by ExpertsThe correct answer is:
B
For A, P A V γ = P (2V) γ
P A = P 2 γ ... (1)
for B, P B = P ... (2)
for C, P C V = P (2V) P C = 2P ... (3)
P A = 2 γ P, P B = P, P C = 2P
where 'P' is final pressure, so
P A : P B : P C = 
: 1 : 2
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