Gun metal is an alloy of
Cu,Ni,Zn
Cu,Sn,Zn
Fe,Mn,C
Cu,Al,Zn

How many of the following metals dissolve in boiling alkali to produce H_(2) gas ? Cu,Ni,Zn,Be,Ag,Fe,Mn,Sn,Al .

Zn, Mo, Fe, Cu are

Zn, Mo, Fe, Cu are

Write the names and formulate of main ores of Fe , Cu , Al and Zn .

How many of the following metals can be extracted by auto - reduction ? Fe, Zn, Pb, Al, Hg, Cu, K, Ca

Write the name and formula of main ores of Fe, Cu,Al and Zn.

How many of the following metals is extracted by self reduction process? Pb,Au,Mg,Sn,Fe,Al,Ag,Hg,Na,Zn,Cu,Ca