Embibe Experts Solutions for Chapter: Electrochemistry, Exercise 3: EXERCISE-II (Previous Year Questions)

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to :

At $25°\mathrm{C}$, molar conductance of $0.1$ molar aqueous solution of ammonium hydroxide is $9.54 {\mathrm{ohm}}^{-1} {\mathrm{cm}}^2 {\mathrm{mol}}^{-1}$ and at infinite dilution its molar conductance is $238 {\mathrm{ohm}}^{-1} {\mathrm{cm}}^2 {\mathrm{mol}}^{-1}$. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

During the electrolysis of molten sodium chloride, the time required to produce $0.10$ mol of chlorine gas using a current of $3\mathrm{A}$ is

For an electrolytic solution having concentration $0.1 \mathrm{M}$ and resistance is $1 \mathrm{K\Omega }$. If distance between electrode is $100 \mathrm{cm}$ and area is $1 {\mathrm{cm}}^2$ then calculate ${\lambda }_{\mathrm{M}}$ in $\mathrm{S} {\mathrm{cm}}^2{\mathrm{mol}}^{-1}$.

Zinc can be coated on iron to produce galvanized iron, but the reverse is not possible. It is because

Resistance of $0.2 \mathrm{M}$ solution of an electrolytes is $50 \mathrm{\Omega }$. The specific conductance of the solution is $1.3 {\mathrm{Sm}}^{-1}$. If resistance of the $0.4 \mathrm{M}$ solution of the same electrolyte is $260 \mathrm{\Omega }$, its molar conductivity is 

The equivalent conductance of $\mathrm{NaCl}$ at concentration $\mathrm{C}$ and at infinite dilution are ${\mathrm{\lambda }}_{\mathrm{c}}$and ${\mathrm{\lambda }}_{\infty }$ respectively. The correct relationship between ${\mathrm{\lambda }}_{\mathrm{c}}$ and ${\mathrm{\lambda }}_{\infty }$ is given as (where, the constant $\mathrm{B}$ is positive)

Calculate ${{\mathrm{\Lambda }}^{°}}_{\mathrm{HOAC}}$ using appropriate molar conductances of the electrolytes listed above at infinite dilution in the water at 25$°\mathrm{C}$.