Question

x ml of H2 effuse through a hole in a container in 5 sec.the time taken for the effusionof same volume of the gas specified below under identical condition is

1.10s,He

2.20s,O

3.25s,CO

4.55s,CO2

Answer 1

Answer is option (2) 20seconds, Oxygen

Explanation:

Molecular mass of Hydrogen is 2 and that of oxygen is 32

We know that, the time taken for effusion is indirectly proportional to the Square root of molecular mass

rate of effusion $\alpha$ 1 / square root of molecular mass

rate of H2 / rate of O2 = Square root of 32/ Square root of 2

rate of H2 / rate of O2 = 5.66 / 1.41 = 4

rate of O2 = 4 times the rate of H2

= > 4 * 5 = 20 seconds

It is given that oxygen takes 20 seconds for effusion. Hence verfied

Answer 2

The rate of diffusion is taking right value and denotes M is the molecular mass of the gas.

It pays attention in evaluating ratio of molar mass of H2 and O2 is equal to 2.32 and consider at 1:16.

According to the formula, the volume of oxygen takes well and gas will be 4 times the rate of effusion of hydrogen gas.