A mixture of two volatile liquids A and B shows a negative deviation from Raoult's law. Which of the following statements is INCORRECT regarding this mixture?
The enthalpy of mixing is negative.
The volume of mixing is negative.
The boiling point of the mixture is lower than that predicted by Raoult's law.
The intermolecular forces between A and B are stronger than the A-A and B-B interactions.
Related Questions
Which concentration term is independent of temperature?
Molarity
Molality
Normality
Formality
A solution is prepared by dissolving 0.5 moles of solute in 250 g of solvent. What is the molality of the solution?
2 m
0.5 m
1 m
4 m
What is the molarity of a solution containing 1 mole of solute in 500 mL of solution?
0.5 M
1 M
2 M
4 M
Which of the following is NOT a method for expressing the concentration of a solution?
Molarity
Molality
Mass percentage
Density
In the leaching of alumina from bauxite, the concentration of the ore is achieved by:
Selective dissolution of alumina
Froth flotation
Magnetic separation
Electrolysis
Which of these is the correct formula for calculating molality?
Moles of solute / Liters of solution
Moles of solute / Kilograms of solvent
Grams of solute / Liters of solution
Grams of solute / Kilograms of solvent
Which of the following methods is NOT typically used for concentrating a dilute ore?
Froth flotation
Magnetic separation
Gravity separation
Distillation
Molality is defined as the number of moles of solute per:
Liter of solution
Kilogram of solvent
Kilogram of solution
Liter of solvent
Which of the following is used as a depressant in the froth flotation process for separating ZnS and PbS?
NaCN
Pine oil
Water
Xanthates
What is the unit of molarity?
mol/kg
mol/L
g/L
g/mol
