Which of the following is released at cathode during electrolysis of aqueous sodium chloride?

Calculate the $\mathrm{E}_{\text {cell }}^{\circ}$ of $\mathrm{Al}\left|\mathrm{Al}_2\left(\mathrm{SO}_4\right)_{3(\mathrm{1M})}\right|\left|\mathrm{HCl}_{(\mathrm{IM})}\right| \mathrm{H}_{2(\mathrm{~g})(\mathrm{1atm})}, \mathrm{Pt}$ $\left(\right.$ Given $E_{\mathrm{AB}^{3+}|\mathrm{A}|}^0=-1.66 \mathrm{~V}$ )

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

A conductivity cell dipped in 0.05 MKCl has resistance 600 ohm. If conductivity is $0.0012 \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. What is the value of cell constant?