Helium and Argon are monoatomic gases and their atomic weights are 4 and 40 respectively . Under identical conditions, helium will diffuse through a semipermeable membrane

Question

$\begin {array}{1,1}(a)\;3.16\; \text{times as fast as argon}\\(b)\;7.32\; \text{times as fast as argon}\\(c)\;1.58\; \text{times as fast as argon}\\(d)\;10\; \text{times as fast as argon}\end {array}$