19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In which mode of expression, the concentration of solution remains independent of temperature?
(iii) mix S for an ideal solution.
Which one is not equal to zero for an ideal solution? (CBSE AIPMT 2015) (a) mix H (b) mix S (c) mix V (d) observed calculated byRaoult 'slaw p p p Ans. (b) Sol. (i) there will be no change in volume on mixing the two …
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)
The unit of ebullioscopic constant is (UK PMT 2014) (a) Kkgmol (b) molkgK (c) Kgmol K (d) KmolKg
To observe an elevation in boiling point of 0.050C, the amount of a solute (molecular weight = 100) to be added to 100 g of water (Kb =0.5) is (WB JEE 2014)
Dissolution of 1.5 g of a non-volatile solute (molecular weight = 60) in 250 g of a solvent reduces its freezing point by 0.01 °C. Find the molal depression constant of the solvent. (MHT CET 2014)
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…
The vapour pressure lowering caused by the addition of 100 g of sucrose (molecular mass = 342) to 1000 g of water (if the vapour pressure of water at 250C is 23.8 mm Hg) is (AFMC 2012)
The empirical formula of a non-electrolyte is CH₂O. A solution containing 3 g of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution. The molecular formula of the compound is (KCET 2011)
The mass of non-volatile solute of molar mass 40 g/mol that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is (KCET 2012)
0.1 M NaCl and 0.05 M BaC₁₂ solutions are separated by a semipermeable membrane in a container. For this system, choose the correct answer. (AMU 2010)
The boiling point of water is 1000C. What will be the boiling point of an aqueous solution containing 0.6 g of urea (molar mass = 60) in 100 of water? b k for water 0.52 K / m (RPMT 2010) (a) o 100.052 C (b) o 101.052…
The relative lowering of vapour pressure is equal to the ratio between the number of (BVP 2010)
Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression? (AIPMT 2014)
The mixture that forms maximum boiling azeotrope is: (NEET 2019)
At o 25 C, the total pressure of an ideal solution obtained by mixing 3 moles of ‘A’ and 2 moles of ‘B’, is 184 torr. What is the vapour pressure (in torr) of pure ‘B’ at the same temperature? (Vapour pressure of pure…
0.2 molal acid HX ionises 20%. Kf for acid is 1.86 molality–1. Freezing point is
A solution contains non-volatile solute of molecular mass M2. Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure? (Punjab PMET 2007) (a) m M VRT (b) m RT M V (c) …
If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water ( Tf), when 0.01 mole of sodium sulphate is dissolved in 1 kg of water, …
0.01 M solution each of urea, common salt and Na₂SO₄ are taken, the ratio of depression of freezing point is
If is degree of dissociation of Na₂SO₄, the van’t Hoff’s factor, i, used for calculating the molar mass is
A solution of sucrose (molar mass = 342g mol -l) has been prepared by dissolving 68.5g of sucrose in 1000g of water. The freezing point of the solution obtained will be (Kf for water = 1.86 K Kg mol-l) (AFMC 2010) (a)…
Which of the following pair of solutions are expected to be isotonic at the same temperature?
Four solutions of K₂SO₄ with the following concentration 0.1 m, 0.01 m, 0.001 m and 0.0001 m SOLUTIONS are available. The maximum value of van’t Hoff factor, i, corresponds to