19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A solution containing 12.5g of non-electrolyte substance in 185g of water shows boiling point elevation of 0.80 K. Calculate the molar mass of the substance. SOLUTIONS (Kb = 0.52 K kg mol-1)
In a solution of 7.8 g of benzene (C₆H₆) and 46 g of toluene (C₆H₅CH₃), the mole fraction of benzene is
Mole fraction of the solute in a 1.00 molal aqueous solution is (AIPMT 2011)
What happens when an egg is kept in saturated solution of NaCl after removing its hard shell in dilute HCl? (OJEE 2010)
Out of the compounds below, the vapour pressure of
Isotonic solutions are the solutions having the same (RPMT 2010)
What happens to freezing point of benzene when naphthalene is added? (OJEE 2010)
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)
The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A non-volatile electrolyte solute weighing 2.175 g is added to 30.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what …
The concentration (in mol/L) of the solution having osmotic pressure 0.0821 atm at 300 K will be (AFMC 2009)
Molarity of a given orthophosphoric acid solution is 3 M. Its normality is (KCET 2007)
The molarity of a solution containing 5.0g of NaOH in 250 mL solution is (AFMC 2009)
Van’t Hoff factor more than unity indicates that the solute in solution is (Manipal 2008)
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?
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)
A plant cell shrinks when it is kept in
A 6% solution of urea is isotonic with
Osmotic pressure is proportional to
A semipermeable membrane
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
Camphor is often used in molecular mass determination because
Which of the following aqueous solutions has the highest boiling point?
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.
The order of boiling points of four equimolar aqueous solutions is C < B < A < D. The correct order of their freezing points is