Calculate the molar mass of nonvolatile solute when 4 g of it is dissolved in 100 g solvent that boils at 319.4 K [$K_b$ = 2.4 K kg $\text{mol}^{-1}$; B.P of pure solvent = 319 K]

If the emf of cell, $\text{Cu}_{(s)} \mid \text{Cu}^{2+}_{(1M)} \| \text{Ag}^{+}_{(1M)} \mid \text{Ag}$ is 0.463 V at $25\ ^\circ\text{C}$ and standard potential of Cu electrode is 0.337 V. Find the standard potential of Ag electrode

Which of the following hot aqueous solutions is used to dip carbon rods of $\text{H}_2 - \text{O}_2$ fuel cell ?

The conductivity of 0.02 M of KCl solution at 298 K is 0.0123 $\text{ohm}^{-1}\ \text{cm}^{-1}$. If the resistance of the cell containing this solution is 120 ohms, what is the value of the cell constant ?