19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Benzoic acid is dissolved in benzene, van’t Hoff factor will be
A solution containing 10g per dm3 of urea (molecular mass = 60g mol–1) is isotonic with a 5% solution of a non-volatile solute. The molecular mass of this non-volatile solute is
The concentration (in mol/L) of the solution having osmotic pressure 0.0821 atm at 300 K will be (AFMC 2009)
The percentage (by weight) of sodium hydroxide in a 1.25 molal NaOH solution is
The vapour pressure lowering caused by the addition of 100 g of sucrose (molecular mass = 342) to 1000 g of water (if the vapour pressure of water at 250C is 23.8 mm Hg) is (AFMC 2012)
The system that forms maximum boiling azeotrope is
A plant cell shrinks when it is kept in
What happens when an egg is kept in saturated solution of NaCl after removing its hard shell in dil. HCl?
The concentration (in mol/L) of the solution having osmotic pressure 0.0821 atm at 300 K will be
Camphor is often used in molecular mass determination because
Osmotic pressure is proportional to
Dissolution of 1.5g of a non-volatile solute (mol. wt. = 60) in 250g of a solvent reduces its freezing point by 0.01ºC. Find the molal depression constant of the solvent.
A semipermeable membrane
The temperature at which 10% aqueous solution (w/V) of glucose will exhibit the osmotic pressure of 16.4 atm, is (R = 0.082 dm3 atm K–1 mol–1)
What happens to freezing point of benzene when naphthalene is added?
A solution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows (KCET 2011)
The order of boiling points of four equimolar aqueous solutions is C < B < A < D. The correct order of their freezing points is
A 6% solution of urea is isotonic with
During freezing of a solution the following are in equilibrium
The mass of non-volatile solute of molar mass 40 g/mol that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is (KCET 2012)
20g of non-volatile solute is added to 500g of solvent. Freezing point of solvent = 5.48ºC and solution = 4.47ºC, Kf = 1.93ºC/m. Molecular mass of the solute is
Colligative properties of the solution depend on
An aqueous solution of methanol in water has vapour pressure (MP PMT 2007)
A solution with negative deviation among the following is
A non-ideal solution was prepared by mixing 30 mL chloroform and 50 mL acetone. The volume of mixture will be