alleryWhat happens to silver impurities in copper electrorefining?
AThey settle as anode slime
BThey plate as pure copper
CThey form oxygen gas
DThey dissolve as hydrogen
Answer & Solution
Correct answer: A. They settle as anode slime
Noble impurities such as silver settle below the anode as anode slime.
Keep practising Electrolysis
Browse all Electrolysis questions for ICSE Class 10, or explore more Chemistry topics.
Related questions
Match each ion with its preferential discharge order at electrodes:Match each electrochemical electroplating rule with its requirement:Match each industrial electrolytic extraction with its electrolyte and components:Match each electrolytic cell term with its definition:Cu electrodes transfer Cu/Cu2+ only. Mass changes?Aqueous CuSO4 uses Pt electrodes. How does its acidity change?With Pt electrodes, how does aqueous CuSO4's blue colour change?A plating cell has an inert anode. What needs replenishing?