The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aqueous solutions of KCl, CH₃OH and ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_{11}{\mathrm{OSO}}_3^{-}{\mathrm{Na}}^{+}$ at room temperature. The correct assignment of the sketches is

One mole of a monoatomic real gas satisfies the equation p(V − b) = RT where b is a constant. The relationship of interatomic potential V(r) and interatomic distance r for the gas is given by

For gaseous state, if most probable speed is denoted by C*, average speed by and mean square speed by C, then for a large number of molecules the ratios of these speeds are :

Maximum deviation from ideal gas is expected from:

According to kinetic theory of gases

To an evacuated vessel with movable piston under external pressure of 1atm, 0.1mol of He and 1.0 mol of an unknown compound (vapour pressure 0.68 atm. At 0^oC) are introduced. Considering the ideal gas behaviour, the total volume (in lite) of the gases at 0^oC is close to.

The term that corrects for the attractive forces present in a real gas in the van der Waals equation is

At 400 K, the root mean square (rms) speed of a gas (molecular weight = 40) is equal to the most probable speed of gas ast 60 K. The molecular weight of the gas is

A gas described by Van der Waal’s equation