Define the following terms :
(i) Molar conductivity `(wedge_(m))`
(ii) Secondary batteries
(iii) Fuel cell
(b) State the following laws :
(i) Faraday first law of electrolysis
(ii) Kohlrausch's law of independent migration of ions.

Explanation

### Step-by-Step Text Solution:

#### (i) Molar Conductivity `(Λ_m)`

Molar conductivity is defined as the ability of an electrolyte solution to conduct electricity, measured per mole of the solute. It is mathematically expressed as:

\[
Λ_m = \frac{K}{C}
...