The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following is expected to be observed ?
(1)A small decrease in molar conductivity is observed at infinite dilution.
(2)A small increase in molar conductivity is observed at infinite dilution.
(3)Molar conductivity increases sharply with increase in concentration.
(4)Molar conductivity decreases sharply with increase in concentration.Correct
Answer: (4)
Solution
For weak electrolytes, molar conductivity decreases sharply with increase in concentration.