The osmotic pressure of a dilute solution is directly proportional to the

Pickles have a long shelf life and do not get spoiled for months,why?

The osmotic pressure of a $5\% \ (w/V)$ solution of cane sugar at $150\,^{\circ}C$ will be $.......$ $atm$.

What is a "semi-permeable membrane"?

At $27^{\circ}C$,$0.1 \ M$,$1 \ L$ $K_4[Fe(CN)_6]$ aqueous solution and $0.1 \ M$,$1 \ L$ $FeCl_3$ aqueous solution are placed in a container separated by a semi-permeable membrane $AB$. Assume complete dissociation of both the solutes. Which of the following statements is correct?

Which of the following statements is correct for an aqueous solution of $6 \ g \ L^{-1}$ urea and $17.12 \ g \ L^{-1}$ sucrose? [Molar mass of urea $= 60 \ g \ mol^{-1}$,Molar mass of sucrose $= 342 \ g \ mol^{-1}$]