How many of the following metals can replace `Sn`(Tin) from its compounds?
`Mg,Pb,Ni,Cd,Al,Cu,Zn,Ba,Ag,Au`

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

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

How many of these metals can displace H_(2) easily from acids. Fe, Mg, Al, Cu, Ag, Au, 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 .

How many of the following metals can be refined by vapour phase refining ? Zn,Zr,Hg,Cd,Ni,Ti,Co,Pt,Fe .