1- Which pairing of quantity and unit is incorrect?
A- Resistivity; Ω m.
B- Conductance; S m–1.
C- Resistance; Ω.
D- Molar conductivity; S m2 mol–1.
2- Which of the following is not a strong electrolyte?
A- KCl B- CH3COOH C- KNO3 D- NaClO4
3- Which statement is correct about a strong electrolyte?
A- Examples of strong electrolytes include CH3CO2H and Na[CH3CO2].
B-The molar conductivity decreases significantly as the concentration increases.
C-The molar conductivity at infinite dilution can be found by extrapolation from a plot of
molar conductivity against concentration.
D-It is partially ionized in aqueous solution.
4-Which statement is incorrect about a weak electrolyte?
A-The molar conductivity of a weak electrolyte remains approximately constant as the
B-Acetic acid is an example of a weak electrolyte.
C-At infinite dilution, a weak electrolyte is taken to be fully ionized.
D- A weak electrolyte is partially dissociated in aqueous solution.