Which of the following given options correctly describe Kohlrausch's law ?

Options

A. Infinite dilution, each ion makes definite contribution to conductance of an electrolyte whatever be the nature of the other ion of the electrolyte
B. Infinite dilution, each lon makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte
C. Finite dilution, each lon makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte
D. Infinite dilution each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the ion of the electrolyte

Answer

A

Explanation

At infinite dilution, when dissociation is complete each ion makes a definite contribution towards molar conductance of the electrolyte irrespective of the nature of the other ion with which it is associated and that the molar conductance of any electrolyte at infinite dilution is given by the sum of the contributions of two ions. This is called Kohlrausch.s law.
`^^_(m) ^(oo) = lamda _(+) ^(oo) lamda _(-) ^(oo).`
are molar ionic conductance at infinite dilution for cations and anions, respectively.