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Question

Balloons of 4L capacity are to be filled with Hydrogen at a pressure of 1 atm and 270 C from an 8L cylinder containing Hydrogen at 10 atm at the same temperature. The number of balloons that can be filled is

A

20

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B

18

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C

40

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D

38

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Solution

The correct option is B

18


P1V1=P2V2
8×10=1×V2
V2=80
Vol. of H2 escapes = V2V1=808=72lt
No. of balloons filled = V2V1V=724=18

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