Question

X ml of H2 gas effuses through a hole in a container in 5 sec. The time taken for the effusion of the same volume of the gas specified below under identical conditions is :

• A. 10 sec. He
• B. 20 sec. O2
• C. 25 sec. CO2
• D. 55 sec. CO2

Answer 1

Answer: (B)

20 sec. O2

Answer 2

$\frac { \mathrm { r } _ { 1 } } { \mathrm { r } _ { 2 } } = \frac { \mathrm { t } _ { 2 } } { 5 } = \sqrt { \frac { \mathrm { M } _ { 2 } } { 2 } }$