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Define Freezing point.
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
The temperature at which vapour pressure of a liquid becomes equal to the atmospheric
pressure is _______.
(A) melting point
(B) boiling point
(C) 273 K
(D) 373 K
Concept: Colligative Properties and Determination of Molar Mass >> Relative Lowering of Vapour Pressure
Which mixture is used for respiration by deep sea divers?
(A) He + O2
(B) Ne + O2
(C) Ar + O2
(D) Kr + O2
Concept: Solubility >> Solubility of a Gas in a Liquid
How does solubility of a gas in water varies with the temperature?
Concept: Solubility >> Solubility of a Gas in a Liquid
Derive the relation ∆H − ∆U = ∆nRT.
Concept: Solubility >> Solubility of a Solid in a Liquid
When KOH solution is added to potassium dichromate solution the colour of solution
changes to yellow, because _______
(A) chromate ion changes to dichromate ion
(B) dichromate ion changes to chromate ion
(C) oxidation number of chromium changes from + 6 to + 4
(D) oxidation number of chromium changes from + 4 to +6
Concept: Expressing Concentration of Solutions
How van’t Hoff factor is related to the degree of dissociation?
Concept: Abnormal Molar Masses
Which of the following 0.1 M aqueous solutions will exert the highest osmotic pressure?
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
Which of the following 0.1 M aqueous solutions will exert the highest osmotic pressure?
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
Derive the relation between the elevation of boiling point and molar mass of solute.
Concept: Colligative Properties and Determination of Molar Mass >> Elevation of Boiling Point
Define Semipermeable membrane
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
Define Semipermeable membrane
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
22.22 gram of urea was dissolved in 300 grams of water. Calculate the number of moles of urea and molality of the urea solution. (Given: a Molar mass of urea = 60 gram mol-1)
Concept: Expressing Concentration of Solutions
Derive van’t Hoff general solution equation.
Concept: Types of Solutions
Derive van’t Hoff general solution equation.
Concept: Types of Solutions
Define the following terms :
a. Cryoscopic constant
b. Resistivity
Concept: Colligative Properties and Determination of Molar Mass - Introduction
Define the following term:
Hypotonic solution
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
Define the following term:
Hypotonic solution
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
What is the freezing point of a liquid? The freezing point of pure benzene is 278.4 K. Calculate the freezing point of the solution when 2.0 g of a solute having molecular weight 100 g mol-1
is added to 100 g of benzene.
( Kf of benzene = 5.12 K kg mol-1 .)
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
4.0 grams of NaOH ( Molar mass = 40.0 g mol-1 ) is dissolved in 500 cm3 of water. What is the molarity of NaOH solution?
Concept: Colligative Properties and Determination of Molar Mass - Introduction
