What is anode mud?

(a) Describe the method of refining crude nickel metal. (b) Name the common element present in the anode mud in electrolytic refining of copper. Why are they present in anode mud?

Name the precious metals in anode mud? Unlike copper, these metals do not enter into the solution - why?

Fill in the blanks : During electro refining of copper ……….. And ………….. Metal are present in anode mud.

Why are Ag and Au remain in anode mud during electrolysis refining of copper ?