The metal which can be extracted simply by heating the cinnabar ore in the air is: (a) Zn (b) Cu (c) Al (d) Hg
(d) Hg Mercury is a low reactive metal. Thus, it can be extracted from its ore cinnabar, HgS, by heating it in air.
How many of the following metals are extracted by self reduction process? Pb, Au, Mg, Sn, Fe, Al, Ag, Hg, Na, Zn, Cu, Ca