19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
Vapour pessure of CCl₄ at 25ºC is 143 mm Hg. 0.5g of a non-volatile solute (mol. wt. 65) is dissolved in 100 cm3 of CCl₄. Find the vapour pressure of the solution. (Density of CCl₄ = 1.58 g/cm3).
The order of boiling points of four equimolar aqueous solutions is C < B < A < D. The correct order of their freezing points 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.
Given that Tf is the depression in freezing point of the solvent in a solution of a nonvolatile solute of molality 1, the quantity f m T lt m → is equal to
Depression of freezing point for …(i)… is directly proportional to …(ii)… Here, (i) and (ii) refer to
The normality of 10% H₂SO₄ solution (d = 1.1g/cm3) is
The vapour pressure of solution of 5g of non- electrolyte in 100g of water at a particular temperature is 2985 Nm-2. The vapour pressure of pure water at that temperature is 3000 Nm-2. The molecular weight of the solu…
Camphor is often used in molecular mass determination because
Calculate the molarity of Na₂CO₃ solution if the normality of Na₂CO₃ Solution is 0.2 N.
What happens to freezing point of benzene when naphthalene is added?
Assertion: Molecular mass of benzoic acid when determined by colligative properties is found high. Reason: Dimerisation of benzoic acid.
The following solutions were prepared by dissolving 10 g glucose (C₆H₁₂O₆) in 250 ml of water (P₁) 10 g of urea (CH₄N₂O) in 250 ml of water (P₂) and 10 g of sucrose (C₁₂H₁₂O₁₁) in 250 ml of water (P₃). The right optio…
The latent heat of vaporisation of water is 9700 cal/mole and if the b.p. is 100 °C, the ebullioscopic constant of water is
The correct option for the value of vapour pressure of a solution at 45 °C with benzene to octane in molar ratio 3 : 2 is: [At 45 °C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume idea…
The freezing point depression constant f K of benzene is 5.12 K kg mol-1. The freezing point depression for the solution of molality 0.078 m containing a non- electrolyte solute in benzene is (rounded off upto two dec…
Osmotic pressure is proportional to
What weight of glycerol should be added to 600 g of water in order to lower its freezing point by 10ºC? (Kf = 1.86ºC m–1). (Molecular mass of glycerol is 92)
A solution of urea (mol. mass 56 g mol–1) boils at 100.18ºC at the atmospheric pressure. If Kf and Kb for water are 1.86 and 0.512 K kg mol–1 respectively, the above solution will freeze at
25 mg of CaCO₃ is dissolved in 5 L of solution. The approximate concentration of solution is
During freezing of a solution the following are in equilibrium
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
For an ideal solution, the correct option is: (2019) (a) mixV at constant T and P (b) mixH at constant T and P (c) mixG at constant T and P (d) mixS at constant T and P Ans. (b) Sol. For ideal solution, mix mix mix mi…
If osmotic pressure of 4% (w/v) solution of sucrose is same as 2% (w/v) solution of 'X’, then the molecular mass of X (g/mol) is (JIPMER 2018)
If the elevation in boiling point of a solution of 10gm of solute (mol. wt. = 100) in 100 gm of water is bT , then ebullioscopic constant of water is