19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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)
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)
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 …
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 mixture that forms maximum boiling azeotrope is: (NEET 2019)
If boiling point of water is 1000C. How much gram of NaCl is added in 500 g of water to increase its boiling point by approx o b H O 1 C K 0.52K kg / mole. x (AllMS 2019)
The mixture which shows positive deviation from Raoult’s law is: (NEET 2020)
The normality of 10% H₂SO₄ solution (d = 1.1g/cm3) is
Calculate the molarity of Na₂CO₃ solution if the normality of Na₂CO₃ Solution is 0.2 N.
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…
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).
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
A solution containing 1.8 g of a compound (empirical formula CH₂O) in 40 g of water is observed to freeze at –0.465 °C. The molecular formula of the compound is (Kf of water = 1.86 kg K mol–1)
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
The freezing point of equimolal aqueous solution will be highest for
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…
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.
Assertion: The molecular weight of acetic acid determined by depression in freezing point method in benzene and water was found to be different. Reason: Water is polar, and benzene is nonpolar.
Assertion: Lowering of vapour pressure is directly proportional to osmotic pressure of the solution. Reason: Osmotic pressure is a colligative property.
Which of the following concentration terms is/are independent of temperature?
Molarity of a solution containing 1g NaOH in 250 ml of solution is
Low concentration of oxygen in the blood and tissues of people living at high altitude is due to .............
If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water fT , when 0.01 mole of sodium sulphate is dissolved in 1 kg of water, is…