Which of the following is correct?
Wolframite is FeWO4
Wolframite is ferrous tungstate (FeWO4) which is magnetic in nature.
The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reaction.
Auto-reduction process is used in the extraction of
Among the following groups of oxides, the group containing oxides that cannot be reduced by carbon to give the respective metal is
van-Arkel method of purification of metals involves converting the metal to a
A metal which is refined by poling is
Wolframite ore is separate from tin stone ore by the process of
Pb and Sn are extracted from their chief ore by
‘Lapis-Lazuli’ is a blue coloured precious stone. It is mineral of the class
Gallium arsenide is purified by
Metals found in free as well as combined states are