Question

Molar conductivity of ionic solid depends on:
(A) Temperature
(B) Distance between electrodes
(C) Concentration of electrolytes in solution
(D) Surface area of electrodes

Answer 1

Hint:Molar conductivity is defined as the property of solution which contains 1 mole of electrolyte or it is considered as the function of the ionic strength of the solution or the concentration of the salt. It is used to determine the efficiency of the electrolyte in the conducting electricity in solution. It is the conducting power of the ions that is formed by dissolving one mole of electrolyte in solution.

Complete answer:the molar conductivity increases with the decrease in the dilution or concentration. The increased dilution occurs the dissociation of the electrolyte into ions which thereby increases the number of active ions in solution. These active ions tend to impart conductivity. The molar conductivity of the ionic solution generally depends on the temperature. so as the temperature increases of the ionic solution the molar conductivity increases. The reason that as we increase the temperature the energy of the ions increases thereby increasing the speed or the movement or the collisions or the mobility of the ions in the solution. Due to increase in mobility the molar conductivity increases. The concentration of electrolyte increases thereby decreasing the molar conductivity of the solution. As in the formula these factors are inversely proportional to each other. The formula for molar conductivity is the following:Molar conductivity \[=\dfrac{K}{C}\]

So the correct option for this is option (A) and option (C).

Note:The specific conductivity of the solution depends on the size of the ions present in the solution. It also depends on the viscosity and the temperature. As the specific conductivity was not suitable for the determination for the comparison of the conductance of different electrolytic solutions, the molar conductivity was introduced.