Define the following terms:(i) Molar conductivity (Λm) (ii) Secondary batteries

Molar conductivity (Λm):-Molar conductivity is defined as the conductivity of an electrolyte solution divided by the molar concentration of the electrolyte and so measures the efficiency with which a given electrolyte conducts electricity in solution. It is the conducting power of all the ions produced by dissolving one mole of an electrolyte in solution. The usual symbol is a capital lambda, Λm.
Secondary batteries
A rechargeable battery, storage battery, secondary cell, or accumulator is a type of electrical battery which can be charged, discharged into a load and recharged many times, while a non-rechargeable or primary battery is supplied fully charged and discarded once discharged.