(i) Units of atmospheric pressure and osmotic pressure are the same.

(ii) In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration.

(iii) The value of molal depression constant depends on the nature of the solvent.

(iv) Relative lowering of vapour pressure is a dimensionless quantity.

Correct Answer: (ii) In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration

Explanation: In reverse osmosis, the solvent molecules move from higher concentration of solute to the lower concentration of solute.