19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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?
The volume of 10N and 4N HCl required to make 1L of 7N HCl are
12g of urea is dissolved in 1 litre of water and 68.4 g of sucrose is dissolved in 1 litre of water. The lowering of vapour pressure of first case is
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
An aqueous solution of NaCl freezes at –0.186 °C. Given that 0.512 H O b K K kg mol and 1.86 H O f K K kg mol , the elevation in boiling point of this solution is
An aqueous solution of NaCl shows the depression of freezing point of water equal to 0.372 K. The boiling point of BaCl₂ solution of same molality will be [Kf (H₂O)= 1.86 K kg mol–1; Kb(H₂O) = 0.52 K kg mol–1]
The freezing point of equimolal aqueous solution will be highest for
At a particular temperature, the vapour pressures of two liquids A and B are respectively 120 and 180 mm of Hg respectively. If 2 moles of A and 3 moles of B are mixed to form an ideal solution, the vapour pressure of…
Assertion: If red blood cells were removed from the body and placed in pure water, pressure inside the cells increases. Reason: The concentration of salt content in the cells increases.
The normality of 10% (weight/volume) acetic acid is
A solution containing 10g per dm3 of urea(molecular mass = 60 g mol–1) is isotonic with a 5% solution of a non-volatile solute. The molecular mass of this non- volatile solute is
Which of the following 0.10 m aqueous solutions will have the lowest freezing point?
Which observation(s) reflect(s) colligative properties? (i) A 0.5 m NaBr solution has a higher vapour pressure than a 0.5 m BaCl₂ solution at the same temperature (ii) Pure water freezes at the higher temperature than…
Assertion: If a liquid solute more volatile than the solvent is added to the solvent, the vapour pressure of the solution may increase. Reason: In the presence of a more volatile liquid solute, only the solute will fo…
The freezing point of equimolal aqueous solution will be highest for
12g of urea is dissolved in 1 litre of water and 68.4 g of sucrose is dissolved in 1 litre of water. The lowering of vapour pressure of first case is
The normality of 10% H₂SO₄ solution (d = 1.1g/cm3) is
Assertion: The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and NH₄NO₃ dissolves lowering the temperature. Reason: Addition of non-volatile solute into solvent results into depr…
The normality of 10% (weight/volume) acetic acid is
Calculate the molarity of H₂SO₄ solution if the normality of H₂SO₄ Solution is 0.4 N.
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?
The vapour pressure of a solvent decreases by 10 mm of Hg when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent if…
Calculate the molarity of Na₂CO₃ solution if the normality of Na₂CO₃ Solution is 0.2 N.
The volume of 10N and 4N HCl required to make 1L of 7N HCl are
Assertion: Lowering of vapour pressure is directly proportional to osmotic pressure of the solution. Reason: Osmotic pressure is a colligative property.