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Why does a solution containing non-volatile solute have higher boiling point than the pure solvent ?
Concept: Vapour Pressure of Liquid Solutions >> Vapour Pressure of Liquid- Liquid Solutions
Why is elevation of boiling point a colligative property?
Concept: Colligative Properties and Determination of Molar Mass >> Elevation of Boiling Point
Calculate the freezing point of the solution when 31 g of ethylene glycol (C2H6O2) is dissolved in 500 g of water.
(Kf for water = 1.86 K kg mol–1)
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
Define the following term: Primitive unit cells
Concept: Crystal Lattices and Unit Cells
Define the following term:
Ferromagnetism
Concept: Properties of Solids: Magnetic Properties
Henry’s law constant for CO2 in water is 1.67 × 108 Pa at 298 K. Calculate the quantity of CO2 in 500 mL of soda water when packed under 2.5 atm CO2 pressure at 298 K.
Concept: Solubility >> Solubility of a Gas in a Liquid
Define the term abnormal molar mass.
Concept: Abnormal Molar Masses
Write one difference in Solution and Colloid
Concept: Types of Solutions
Define the following term:
Colligative properties
Concept: Colligative Properties and Determination of Molar Mass >> Elevation of Boiling Point
The vapour pressure of pure liquid X and pure liquid Y at 25°C are 120 mm Hg and 160 mm Hg respectively. If equal moles of X and Y are mixed to form an ideal solution, calculate the vapour pressure of the solution.
Concept: Vapour Pressure of Liquid Solutions >> Vapour Pressure of Liquid- Liquid Solutions
What happens if external potential applied becomes greater than E°cell of electrochemical cell?
Concept: Electrochemical Cells
The conductivity of 0.20 mol L−1 solution of KCl is 2.48 × 10−2 S cm−1. Calculate its molar conductivity and degree of dissociation (α). Given λ0 (K+) = 73.5 S cm2 mol−1 and λ0 (C1−) = 76.5 S cm2 mol−1.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
What type of battery is mercury cell? Why is it more advantageous than dry cell?
Concept: Batteries >> Primary Batteries
Why does the conductivity of a solution decrease with dilution?
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Name the type of cell which was used in Apollo space programme for providing electrical power.
Concept: Batteries >> Primary Batteries
State second law of electrolysis
Concept: Electrolytic Cells and Electrolysis
What advantage do the fuel cells have over primary and secondary batteries?
Concept: Fuel Cells
Which of the following solutions of KCl will have the highest value of molar conductivity?
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Give reasons:
Mercury cell delivers a constant potential during its life time.
Concept: Batteries >> Primary Batteries
The rate constant of a first order reaction increases from 2 × 10−2 to 4 × 10−2 when the temperature changes from 300 K to 310 K. Calculate the energy of activation (Ea).
(log 2 = 0.301, log 3 = 0.4771, log 4 = 0.6021)
Concept: Temperature Dependence of the Rate of a Reaction
