Question

Which of the following pair of gases will have same rate of diffusion under similar conditions?

• A. $H_{2}andHe$
• B. $C{O}_{2}and{N}_{2}O$
• C. $COand{C}_2{H}_4$
• D. NO and CO

Answer 1

Answer: (B), (C)

$COand{C}_2{H}_4$
$C{O}_{2}and{N}_{2}O$

both have the molecular weight 44both have the molecular weight 44

CO and $C_2{H}_4$ both have the molecular weight 44

Rate of difffusion is directly proportional to molecular weight

So both have the molecular weight 44 CO and $C_2{H}_4$ ave same rate of diffusion under similar conditions

Hence options B & C are correct.