NEET
Chemistry
Metallurgy / धातुकर्म
Question Bank
Self Evaluation Test - General Principals and Process of Isolation of Elements
question_answer
In electro-refining of metal the impure metal is made the anode and a strip of pure metal, the cathode, during the electrolysis of an aqueous solution of a complex metal salt. This method cannot be used for refining of
A)silver
B)copper
C)aluminium
D)sodium
Correct Answer:
D
Solution :
[d] Na reacts vigorously with water (exothermic process)