Calculate current in ampere required to deposit $$4.8 \mathrm{~g} ~\mathrm{Cu}$$ from it's salt solution in 30 minutes. [Molar mass of $$\mathrm{Cu}=63.5 \mathrm{~g} \mathrm{~mol}^{-1}$$ ]

Identify the gas produced due to reduction of $$\mathrm{NH}_4^{+}$$ ions at cathode during working of dry cell.

Which among the following statements is true for Galvanic cell?

What will be the concentration of solution of electrolyte if it's molar conductivity and conductivity are respectively 230 $$\Omega^{-1}$$ cm$$^2$$ mol$$^{-1}$$ and 0.0115 $$\Omega^{-1}$$ cm$$^{-1}$$ at 298 K?