JEE Main202225 Jun 2022Evening ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual
Given below are two statements. Statement I: During electrolytic refining. blister copper deposits precious metals. Statement II: In the process of obtaining pure copper by electrolysis method, copper blister is used to make the anode. In the light of the above statements, choose the correct answer from the options given below.
Options
- ABoth Statement I and Statement II are true.
- BBoth Statement I and Statement II are false.
- CStatement I is true but Statement II is false.
- DStatement I is false but Statement II is true.
Correct answer
A. Both Statement I and Statement II are true.
Step-by-step solution
Impure Cu obtained from ores is converted to pure Cu in an electrolyte cell that the impure copper as the anode an pure copper as the cathode. The electrolyte is an aqueous solution of CuSO 4 . At the impure Cu anode, Cu is oxidized along with the more easily oxidized metallic impurities such as Zn and Fe. The less easily oxidized impurities such as Ag , Au , and Pt fall to the bottom of the cell as anode mud, which is reprocessed to recover the precious metals. At the pure Cu cathode, Cu 2 + ions get reduced to pu