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Q.

The pressure and density of a diatomic gas (γ = 7/5 ) change adiabatically from (P, p) to (P', p'). If P/ P' = 128 then p'/p is equal to

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a

128

b

32

c

1/125

d

1/32

answer is D.

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Detailed Solution

PVγ= Constant Pργ= Constant ρ∝P1γρρ′=PP′1r=112857=12757=125=132

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