Chemical Engineering - Stoichiometry

A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are X_c and X_s respectively. Which of the following statement is correct ?

The temperature at which the second Virial co-efficient of a real gas is zero is called the

The hydroxyl ion (OH^-) concentration in a solution having pH value 3 will be

Boiling point of a solution as compared to that of the corresponding solvent is

Real gases approach ideal behaviour at