Qn$.8$

a$)$ A current of $0\mathrm{.}511$amp was used to deposit nickel at the cathode of an electrochemical cell for

$672$ s$.$ The electrolyte used was $NiS{O}_4(aq),$ calculate the mass of nickel metal deposited.

b$)$ Describe in detail the carbonate leaching of uranium ores and its subsequent recovery process.

c$)$ The Zadra elution process is the most widely used method for the recovery of gold from the

carbon in pulp process. With the aid of a diagram describe the Zadra elution process.