Which metal is found in free state
Iron
Gold
Aluminium
Sodium
(b) Gold, $Ag$ and $Pt$ are called noble metals. They are unreactive and found in free state.
Iron obtained from blast furance is:
Calamine is an ore of
Which reaction is not possible for calcination
In metallurgy the term "gangue" is used for
Which of the following statement(s) is / are incorrect ?
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