In a gaseous mixture which of $N{O}_2,C{O}_2,\mathrm{an}\mathrm{d }{N}_{2}O$ gases have the same rate of diffusion:

1. $N{O}_2$ $,$ $C{O}_2$

2. $C{O}_2$ $,$ $N_{2}O$

3. $N{O}_2$ $,$ $N_{2}O$

4. All of the above.

If 400 ml gas at 500 torrs and 666.6 ml gas at 600 torrs is taken in a container of 3 liters, then the total pressure of the mixture is:

1.  200 torr

2.  400 torr

3.  600 torr

4.  50 torr

Average molar kinetic energy of CO and N₂ at same temperature is:

1. KE₁ = KE₂

2. KE₁ > KE₂

3. KE₁ < KE₂

4. Can't say anything. Both volumes are not given.

Van der Waal's real gas acts as an ideal gas at which condition?

1. High temperature, Low pressure

2. Low temperature, High pressure

3. High temperature, High pressure

4. Low temperature, Low pressure

The surface tension of which of the following liquid is maximum:

1. C₆H₆

2. H₂O

3. C₂H₅OH

4. CH₃OH