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Q.

Balloons of 4L capacity are to be filled with Hydrogen at a pressure of 1 atm and 27ºC from an 8L cylinder containing Hydrogen at 10 atm at the same temperature. The number of balloons that can be filled is

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a

38

b

20

c

40

d

18

answer is B.

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Detailed Solution

Given 

Volume of balloon = 4L  

Volume of cylinder = 8L 

pressure of gas in balloon =1atm pressure of gas in cylinder =10atm

T=300K

PV for balloon=4×1=4

PV for Cylinder=8(10-1)=72

No.of ballonsfilled=724=18

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