Total number of main impurities in electrolysis of blister copper:
Au,Ag,Pt,Ru,Th,Te,Sb,Se

In the electrolytic refining of blister copper, the total number of main impurities, from the following, removed as anode mud is __________. Pb, Sb, Te, Ru, Ag, Au and Pt

Among the following total number of possible metals present in anode mud, which is obtained by electrolytic refining of copper. Fe, Ag, Au, Pt, Pb, Zn

Amongst following, total number of metals which occur in native state in the earth's crust are : Pt, Ni, C, Hg, S, Zn, Au, Pb

Find the total number of metals, which makes a thin protective layer of its oxide on treatment with conc. HNO_(3) . Zn,Cu,Al,Pt,Cr,Au,Pb,Fe

Find the total number of elements which show allotropy. C,N,P ,As,Sb,Bi,O,Si,Se