List of top Chemistry Questions on Colligative Properties asked in UP Board XII

Find the osmotic pressure of $\dfrac{M}{10}$ urea solution at 27$^\circ$C. (R = 0.0821 litre atm K$^{-1}$ mol$^{-1}$)
Differentiate between molar and molal elevation constants. Give two different formulae involving these two constants for the determination of molecular mass of solute.
Calculate the mass of a non-volatile solute (molar mass $40 \, \text{gm mol}^{-1}$) which should be dissolved in $114 \, \text{gm$ octane to reduce its vapour pressure to 80%.}