Give equations for the reduction of

Zinc oxide

On which factors does purification of metals depend?

Name the methods used for purification.

With a labelled diagram explain electro-refining of a particular metal.

The metal other than aluminium, which has a strong affinity for oxygen is

A metallic oxide which cannot be reduced by normal reducing agents.

Zinc blende is converted to oxide by _____ (roasting/calcination) process.

Froth floatation process is generally used to concentrate _____ ores (sulphide/carbonate).

State the position of aluminium in the Periodic Table.