19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
60 mL of N/5 H₂SO₄, 10 mL of N/2 HNO₃ and 30 mL of N/10 HCl are mixed together. The strength of the resulting mixture is (UP CPMT 2009)
The molarity of a solution containing 5.0g of NaOH in 250 mL solution is (AFMC 2009)
Assertion: 1.575g H₂C₂O₄.2H₂O in 250 mL solution makes it 0.1 N. Reason : H₂C₂O₄.2H₂O is a dihydrate organic acid.
Calculate the mass of urea (NH₂CONH₂) required in making 0.25 molal aqueous solution using 2.5 L water. (Haryana PMT 2010)
The concentration (in mol/L) of the solution having osmotic pressure 0.0821 atm at 300 K will be (AFMC 2009)
25.3 g of sodium carbonate, Na₂CO₃ is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion and carbonate ions respectively are (Molar mass…
(ii) There will be no change in enthalpies on mixing the two components, i.e., mixing H
Molarity of a given orthophosphoric acid solution is 3 M. Its normality is (KCET 2007)
Van’t Hoff factor more than unity indicates that the solute in solution is (Manipal 2008)
Pure benzene freezes at 5.45ºC at a certain place but a 0.374m solution of tetrachloroethane in benzene freezes at 3.55ºC. The Kf for benzene is
An aqueous solution of methanol in water has vapour pressure (MP PMT 2007)
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)
At 100ºC the vapor pressure of a solution of 6.5g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be (NEET 2016)
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
An aqueous solution is 1.0 molal in KI. Which change will cause the vapour pressure of the solution to increase? (AIPMT 2010)
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?
A 6% solution of urea is isotonic with
A semipermeable membrane
Osmotic pressure is proportional to
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
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 relative lowering of the vapour pressure is equal to the ratio between the numbers of
During freezing of a solution the following are in equilibrium