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‘P’ is the pressure and ‘d’ is the density of gas at constant temperature, then

(A) P ∝ d

(B) P ∝ 1/d 

(C) P ∝ √d 

(D) P ∝ 1/√d 

1 Answer

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Answer is (A) P ∝ d

PV = RT, but V = M/d. Hence P/M = RTd.

Therefore at constant temperature, P∝ d.

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