JEE Questions for Chemistry Solutions Quiz 3 - MCQExams.com

The elevation in boiling point would be highest for
  • 0.08 M BaCl2
  • 0.15 M KCl
  • 0.10 M glucose
  • 0.06 M Ca(NO3)2
The highest osmotic pressure corresponds to the following solution
  • M/10 urea
  • M/10 glucose
  • M/10 HCl
  • M/10 BaCl2
At 25°C, the highest osmotic pressure is exhibited by 0.1 M solution of
  • urea
  • glucose
  • KCl
  • CaCl2
A 6% solution of urea is isotonic with
  • 1 M solution of glucose
  • 0.05 M solution of glucose
  • 6% solution of glucose
  • 25% solution of glucose
Which of the following is not a colligative property ?
  • Optical activity
  • Osmotic pressure
  • Depression of freezing point
  • Elevation of boiling point
The increase in boiling point of a solution containing 0.6 g urea in 200 g water is 0.50°C. Find the molal elevation constant.
  • 10 K kg mol-1
  • 10 K g mol-1
  • 10 K kg mol
  • 1.0 K kg mol-1
Which is not a colligative property in the following ?
  • pH of a buffer solution
  • Boiling point elevation
  • Freezing point depression
  • Vapour pressure lowering
Osmotic pressure of a solution at a given temperature
  • increases with concentration
  • decreases with concentration
  • remains same
  • initially increases and then decreases
The vapour pressure of pure liquid A is 0.80 atm. When a non-volatile B is added to A its vapour pressure drops to 0.60 atm. The mole fraction of B in the solution is
  • 0.125
  • 0.25
  • 0.5
  • 0.75
Highest boiling point is found in
  • 0.1 M NaCl
  • 0.1 M BaCl2
  • 0.1 M sucrose
  • 0.1 M KCl
Isotonic solutions have equal
  • vapour pressure
  • osmotic pressure
  • boiling point
  • freezing point
Maximum lowering of vapour pressure is observed in the case of
  • 0.1 M glucose
  • 0.1 M BaCl2
  • 0.1 M MgSO4
  • 0.1 NaCl
Blood cells do not shrink in blood because blood is
  • hypotonic
  • isotonic
  • equimolar
  • hypertonic
What is the amount of urea dissolved per litre if its aqueous solution is isotonic with 10% cane sugar solution ? (mol. wt. of urea =
  • 200 g/L
  • 19.2 g/L
  • 17.54 g/L
  • 16.7 g/L
Which one is a colligative property ?
  • Boiling point
  • Vapour pressure
  • Osmotic pressure
  • Freezing point
The amount of urea to be dissolved in 500 cc of water ( Kf = 1.86° C ) to produce a depression of 0.186° C in the freezing point is
  • 9 g
  • 6 g
  • 3 g
  • 0.3 g
The freezing point of a 0.05 molal solution of a non-electrolyte in water is
  • -0.093° C
  • 1.86° C
  • 0.93° C
  • 0.093° C
At certain temperature a 5.12% solution of cane sugar is isotonic with a 0.9% solution of an unknown solute. The molar mass of solute is
  • 60
  • 46.17
  • 120
  • 90
  • 92.34
By dissolving 5 g substance in 50 g of water, the decrease in freezing point is 1.2°C . The gram molal depression is 1.85°C . The molecular weight of substance is
  • 105.4
  • 118.2
  • 137.2
  • 154.2
Relative lowering of vapour pressure of a dilute solution is 0.2 . What is the mole fraction of the non-volatile solute ?
  • 0.8
  • 0.5
  • 0.3
  • 0.2
The movement of solvent molecules through a semipermeable membrane is called
  • electrolysis
  • electrophoresis
  • osmosis
  • cataphoresis
The osmotic pressure of 0.2 molar solution of urea at 27°C ( R = 0.082 L atm mol-1 K-1 ) is
  • 4.92 atm
  • 1 atm
  • 0.2 atm
  • 27 atm
Calculate the molar depression constant of a solvent which has freezing point 16.6°C and latent heat of fusion 180.75 Jg-1
  • 2.68
  • 3.86
  • 4.68
  • 2.86
X is dissolved in water. Maximum boiling point is observed when X is ... (0.1 M each )
  • CaSO4
  • BaCl2
  • NaCl
  • urea
Which has minimum osmotic pressure ?
  • 200 mL of 2 M NaCl solution
  • 200 mL of 1 M glucose solution
  • 200 mL of 2 M urea solution
  • All have same osmotic pressure
Solution A contains 7 g/L of MgCl2 and solution B contains 7 g/L of NaCl . At room temperature the osmotic pressure of
  • solution is A greater than B
  • both have same osmotic pressure
  • solution is B greater than A
  • cannot be determine
A 2.0 molal sugar solution has approximately the same freezing point as a 1.0 molal solution of
  • CaCl2
  • CH3 COOH
  • C2H5OH
  • NaCl
van't Hoff factor of aq. K2 SO4 at infinite dilution has value equal to
  • 1
  • 2
  • 3
  • between 2 and 3
van't Hoff factor more than unity indicates that the solute in solution has
  • dissociated
  • associated
  • Both (and (
  • cannot say anything
Abnormal colligative properties are observed only when the dissolved non-volatile solute in a given dilute solution
  • is a non-electrolyte
  • offers an intense colour
  • associates or dissociates
  • offers no colour
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