Which of the following units of electrical measurement is not equivalent to $1$ Siemen?

If $X$ is the specific resistance (resistivity) of the solution and $M$ is the molarity of the solution,the molar conductivity of the solution is given by:

On dilution,which of the following quantities decreases?

Molar conductance $\Lambda_m$ is plotted against $\sqrt{c}$ $(mol^{1/2} \ L^{-1/2})$ for three electrolytes ($NaCl$,$HCl$,$NH_4OH$). Based on the provided graph,which of the following represents the correct identification of curves $1$,$2$,and $3$?

The electrical resistance of a column of $0.05 \ mol \ L^{-1}$ $NaOH$ solution of diameter $1 \ cm$ and length $50 \ cm$ is $5.55 \times 10^{3} \ \Omega$. Calculate its resistivity,conductivity and molar conductivity.

The molar conductivity of $0.02 \ M$ $KCl$ solution is $410 \ \Omega^{-1} \ cm^2 \ mol^{-1}$ at $25^{\circ} C$. Calculate its conductivity?