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

Which of the following element is purified by vapour phase refining?

The pair of metals refined by "vapour phase refining" is

Amongst the following the metals which can be refined by vapour phase refining are : Zn, Cu, Ti, Ni, Co, Al, Zr

How many of these metals can be purified by vapour phase refining Ni, Ti, Zr, Ge, In, Fe, Cu, Au

How many of these metals can be purified by vapour phase refining Ni, Ti, Zr, Ge, In, Fe, Cu, 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 can be extracted by auto - reduction ? Fe, Zn, Pb, Al, Hg, Cu, K, Ca