19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
An azeotropic solution of two liquids has boiling point lower than either of them when it
When acetone and chloroform are mixed together, hydrogen bonds are formed between them. Which of the following statements is correct about the solution made by mixing acetone and chloroform?
Exactly 1 g of urea dissolved in 75 g of water gives a solution that boils at 100.114°C at 760 torr. The molecular weight of urea is 60.1. The boiling point elevation constant for water is
Calculate the molarity of H₂SO₄ solution if the normality of H₂SO₄ Solution is 0.4 N.
The percentage (by weight) of sodium hydroxide in a 1.25 molal NaOH solution 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 normality of 10% (weight/volume) acetic acid is
(ii) There will be no change in enthalpies on mixing the two components, i.e., mixing H
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)
Vapour pressure of pure ‘A’ is 70 mm of Hg at 25ºC. It forms and ideal solution with ‘B’ in which mole fraction of A is 0.8. If the vapour pressure of the solution is 84 mm of Hg at 25ºC, the vapour pressure of pure ‘…
A solution of urea (mol. mass 56 g mol-1) boils at 100.18 °C 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
If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be(NEET 2017)
The volume of 10N and 4N HCl required to make 1L of 7N HCl are
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 system that forms maximum boiling azeotrope is
Mole fraction of the solute in a 1.00 molal aqueous solution is (AIPMT 2011)
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 osmotic pressure is expressed in the unit of (VMMC 2010)
pA and pB are the vapour pressure of pure liquid components A and B respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will be (AIPMT 2012)
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…
What happens to freezing point of benzene when naphthalene is added? (OJEE 2010)
An aqueous solution of urea containing 18g urea in 1500 cm3 of the solution has a density equal to 1.052 g/cm3. If the molecular weight of urea is 60, then the molality of the solution is
What happens when an egg is kept in saturated solution of NaCl after removing its hard shell in dilute HCl? (OJEE 2010)
What is the molarity of a solution containing 10g of NaOH in 500 mL of solution?
Calculate the mass of urea (NH₂CONH₂) required in making 0.25 molal aqueous solution using 2.5 L water. (Haryana PMT 2010)