List of top Chemistry Questions on Colligative Properties asked in AP EAPCET

At \(300\,K\), \(x\) moles of \(CaCl_2\) \((i=2.5;\ \text{molar mass}=111\,g\,mol^{-1})\) is dissolved in \(2.5\,L\) of water. The osmotic pressure of the resultant solution is \(0.75\,atm\). What is \(\Delta T_b\) of the solution? \[ (\text{density of water}=1\,g\,mL^{-1},\; K_b=0.52\,K\,kg\,mol^{-1},\; R=0.08\,L\,atm\,mol^{-1}K^{-1}) \]

The boiling point of 1M aqueous solution of KCl (85% dissociation) having density \(1.04\ \text{g mL}^{-1}\) is \[ \text{(Given: } K_b(\mathrm{H_2O}) = 0.52\ \mathrm{K\ kg\ mol^{-1}}, \quad \text{Molar mass of KCl} = 74.5\ \mathrm{g\ mol^{-1}} \text{)} \]

At \(298\ K\), vapour pressures of two pure liquids A and B are \(200\) and \(400\ \text{mm Hg}\) respectively. If mole fractions of A and B in solution are \(0.7\) and \(0.3\) respectively, what is the mole fraction of B in vapour phase?

The freezing point depression of a solution containing \(0.6\ \text{g}\) of urea \((\text{molar mass}=60\ \text{g mol}^{-1})\) in \(100\ \text{g}\) of benzene is in K \((K_f=4.0\ \text{K kg mol}^{-1})\):

At \(298K\), the vapour pressure of pure water is \(25\ torr\). The vapour pressure of water, when \(12\ g\) of urea \((\text{molar mass }=60\ g\ mol^{-1})\) and \(36\ g\) of glucose \((\text{molar mass }=180\ g\ mol^{-1})\) is dissolved in \(100\ g\) of water at the same temperature \((in\ torr)\) is

Which of the following solution has the highest freezing point?

\(0.05\) mole of a non-volatile solute is dissolved in \(500\,g\) of water. What is the depression in freezing point of resultant solution?
\((K_f(H_2O)=1.86\,K\,kg\,mol^{-1})\)