Kohlrausch Law

Q.

Why does molar conductance increases with dilution?

Q.

How do You find Molar Conductivity at Infinite Dilution?

Q.

What is Molar Conductivity at Infinite Dilution?

Q. The conductance of a 0.0015 M aqueous solution of a weak monobasic acid was determined by using a conductivity cell consisting of platinized Pt electrodes. The distance between the electrodes is 120 cm with an area of cross section of $1c{m}^2$. The conductance of this solution was found to be $5\times {10}^{-7}S$. The pH of the solution is 4. The value of limiting molar conductivity $\left({\Lambda }_m^{\circ }\right)$ of this weak monobasic acid in aqueous solution is $Z\times {10}^{2}Sc{m}^{-1}mo{l}^{-1}$. The value of Z is___

Q. What is kinetic energy ? What is resistance?

Q. According to Kohlrausch’s law, conductivity of ions at infinite dilutions does not depend on

1. pressure
2. temperature
3. concentration
4. nature of co-ions

Q. What would be conductivity of $M{X}_2$ if conductivity of X- and ​$M^{2+}is5oh{m}^{-1}c{m}^{2}mo{l}^{-1}and6oh{m}^{-1}c{m}^{2}mo{l}^{-1}$ respectively?

1. $10oh{m}^{-1}c{m}^{2}mo{l}^{-1}$
2. $11oh{m}^{-1}c{m}^{2}mo{l}^{-1}$
3. $14oh{m}^{-1}c{m}^{2}mo{l}^{-1}$
4. $17oh{m}^{-1}c{m}^{2}mo{l}^{-1}$

Q. The limiting molar conductivities ${\lambda }^{\circ }$ for $NaCl,KBr$ and $KCl$ are $126,152$ and $150Sc{m}^{2}mo{l}^{-1}$respectively. The ${\lambda }^{\circ }$ for $NaBr$ is

1. 176 S cm²mol^-1
2. 278 S cm²mol^-1
3. 128 S cm²mol^-1
4. 302 S cm²mol^-1

Q. When magnesium metal is added to water, hydrogen gas, ${\text{H}}_2$ is released. If 72 g of hydrogen gas is liberated in this reaction, how many number of moles of hydrogen gas is produced?
$\text{Mg}$ (s) + $\text{2}$${\text{H}}_2\text{O}$ (l) $\to$ $\text{Mg}{\text{(OH)}}_2$ (aq) + ${\text{H}}_2$ (g) ​