19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
What happens to freezing point of benzene when naphthalene is added? (OJEE 2010)
Out of the compounds below, the vapour pressure of
The molarity of a solution containing 5.0g of NaOH in 250 mL solution is (AFMC 2009)
The concentration (in mol/L) of the solution having osmotic pressure 0.0821 atm at 300 K will be (AFMC 2009)
Assertion: One molal aqueous solution of glucose contains 180g of glucose in 1kg water. Reason: Solution containing one mole of solute in 1000 g of solvent is called one molal solution. (AIIMS 2008)
Van’t Hoff factor more than unity indicates that the solute in solution is (Manipal 2008)
Molarity of a given orthophosphoric acid solution is 3 M. Its normality is (KCET 2007)
Which of the following aqueous solutions has the highest boiling point?
The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to:
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
A 6% solution of urea is isotonic with
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)
The concentration (in mol/L) of the solution having osmotic pressure 0.0821 atm at 300 K will be
What happens when an egg is kept in saturated solution of NaCl after removing its hard shell in dil. HCl?
A plant cell shrinks when it is kept in
A semipermeable membrane
Osmotic pressure is proportional to
Camphor is often used in molecular mass determination because
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.
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
The order of boiling points of four equimolar aqueous solutions is C < B < A < D. The correct order of their freezing points is
What happens to freezing point of benzene when naphthalene is added?
During freezing of a solution the following are in equilibrium
The relative lowering of the vapour pressure is equal to the ratio between the numbers of