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Question

An LPG cylinder, containing 15 kg butane at 27C and 10 atm pressure, is leaking. After one day, its pressure decreased to 8 atm. The quantity of gas leaked is :

A
1 kg
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B
2 kg
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C
3 kg
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D
4 kg
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Solution

The correct option is C 3 kg
We know that the ideal gas equation :

PV=nRT

Where, P = pressure
V = volume of gas
n = moles
R = Ideal gas constant
T = temperature
n=mM

So,
Pm=K

P1m2=P2m1

10×m2=8×15

m2=12 kg

So, the amount of gas leaked =1512=3 kg.

Hence, the correct option is C.

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