Electrochemistry Quiz

What is the main postulate of Arrhenius theory regarding electrolytic solutions?

• Electrolytes dissociate into ions only in the presence of a solvent

• Electrolytes dissociate into ions at any concentration

• Electrolytes dissociate into ions at high temperatures

• Electrolytes dissociate into ions only at infinite dilution

What is the unit of specific conductance or conductivity?

• Mho

• Reciprocal ohm

• Siemens

• Ohm

What is the relationship between specific resistance and specific conductance?

• Directly proportional

• No relationship

• Inversely proportional

• Exponential relationship

What is the equivalent conductance of an electrolyte at infinite dilution?

• Depends on the concentration of the solution

• Depends on the nature of the ion

• Constant value for each ion

• Zero

What is the formula for calculating molar conductance?

• Molar conductance = Specific conductance / Volume

• Molar conductance = Specific conductance / Molarity

• Molar conductance = Specific conductance * Cell constant

• Molar conductance = Specific conductance * Volume

What is the main limitation of Arrhenius theory of electrolytic dissociation?

• Cannot explain conductance at low concentrations

• Cannot explain conductance in non-polar solvents

• Cannot explain conductance at high temperatures

• Cannot explain conductance in fused state

What is the relationship between degree of ionization and equivalent conductance?

• Exponential relationship

• No relationship

• Inversely proportional

• Directly proportional

What is the concept of Kohlrausch's law regarding weak electrolytes?

• Complete ionization at any concentration

• Equilibrium between ions and unionized molecules

• No dissociation at any concentration

• Partial ionization at any concentration

How can Kohlrausch's law be used to determine the solubility of a sparingly soluble salt?

• By determining the molar conductance

• By measuring the specific conductance

• By calculating the equivalent conductance

• By analyzing the ionic product of water

What is the formula for calculating the ionic product of water using Kohlrausch's law?

• Ionic product = Molar conductance / Concentration

• Ionic product = Molar conductance * Volume

• Ionic product = Specific conductance / Molarity

• Ionic product = Specific conductance * Cell constant