Question

Balloons of 4L capacity are to be filled with Hydrogen at a pressure of 1 atm and ${27}^{0}C$ from an 8L cylinder containing Hydrogen at 10 atm at the same temperature. The number of balloons that can be filled is

• A. 20
• B. 18
• C. 40
• D. 38

Answer 1

The correct option is B

18

$P_1{V}_1=P_2{V}_2$
$8\times 10=1\times V_2$
$V_2=80$
Vol. of $H_2$ escapes = $V_2-V_1=80-8=72lt$
No. of balloons filled = $\frac{V_2-V_1}{V}=\frac{72}{4}=18$