EASY
JEE Main/Advance
IMPORTANT
Earn 100

5 litre of a solution of H2O2 with x N strength is diluted to 5.5 litre. This 5.5 litre H2O2 solution gives 28 litre O2 at NTP. Find the value of x.

Important Questions on Solutions

HARD
JEE Main/Advance
IMPORTANT
Two beaker A and B present in a closed vessel. Beaker A contains 152.4 g aqueous solution of urea, containing 12 g of urea. Beaker B contains 196.2 g aqueous solution of glucose, containing 18 g of glucose. Both solutions allowed to attain the equilibrium. Determine w/w% of glucose in its solution at equilibrium.
HARD
JEE Main/Advance
IMPORTANT
The vapour pressure of two pure liquids A and B, that form an ideal solution, are 100 and 900 torr respectively at temperature T. This liquid solution of A and B is composed of 1 mole of A and 1 mole of B. What will be the pressure, when 1 mole of mixture has been vaporized ?
HARD
JEE Main/Advance
IMPORTANT
The addition of 3 g of substance to 100 g CCl4M=154 g mol-1 raises the boiling point of CCl4 by 0.60°C of KbCCl4 is 5.03 kg mol-1 K. Calculate:
(a) the freezing point depression
(b) the relative lowering of vapour pressure
(c) the osmotic pressure at 298 K
(d) the molar mass of the substance
Given KfCCl4=31.8 kg mol-1 K and ρ (density) of solution =1.64 g cm3.
MEDIUM
JEE Main/Advance
IMPORTANT
30 mL of CH3OHd=0.7980 g cm-3 and 70 mL of H2Od=0.9984 g cm-3 are mixed at 25°C to form a solution of density 0.9575 g cm-3. Calculate the freezing point of the solution. KfH2O is 1.86 kg mol-1 K. Also calculate its molarity.
MEDIUM
JEE Main/Advance
IMPORTANT
The freezing point depression of a 0.109 M aq. solution of formic acid is -0.21°C. Calculate the equilibrium constant for the reaction,
HCOOH(aq)H+(aq)+HCOO(aq)
Kf for water =1.86 kg mol-1 K
HARD
JEE Main/Advance
IMPORTANT
The freezing point of 0.02 mol fraction solution of acetic acid (A) in benzene (B) is 277.4 K. Acetic acid exists partly as a dimer 2 A=A2. Calculate equilibrium constant for the dimerisation. Freezing point of benzene is 278.4 K and its heat of fusion ΔHf is 10.042 kJ mol-1.
HARD
JEE Main/Advance
IMPORTANT
The vapour pressure of two miscible liquids (A) and (B) are 300 and 500 mm of Hg respectively. In a flask 10 mole of (A) is mixed with 12 mole of (B). However, as soon as (B) is added, (A) starts polymerising into a completely insoluble solid. The polymerisation follows first-order kinetics. After 100 minute, 0.525 mole of a solute is dissolved which arrests the polymerisation completely. The final vapour pressure of the solution is 400 mm of Hg. Estimate the rate constant of the polymerisation reaction. Assume negligible volume change on mixing and polymerisation, and ideal behaviour for the final solution.
HARD
JEE Main/Advance
IMPORTANT
1.5 g of monobasic acid when dissolved in 150 g of water lowers the freezing point by 0.165°C.0.5 g of the same acid when titrated, after dissolution in water, requires 37.5 mL of N 10 alkali. Calculate the degree of dissociation of the acid Kf for water =1.86°C mol-1.