In the process of obtaining cast iron from pig iron,the reverberatory furnace is lined with ..........

In the Mc Arthur Forest method,silver is extracted from the solution of $Na[Ag(CN)_2]$ by the use of:

Carbon reduction process is not commercially applicable for which of the following set of oxides to extract the respective metal?
$(I)$ $ZnO$,$(II)$ $Fe_2O_3$,$(III)$ $Al_2O_3$,$(IV)$ $SnO_2$,$(V)$ $MgO$

Which of the following compounds is used for the extraction of aluminum by electrolysis?

Suggest a condition under which magnesium could reduce alumina. The two equations are:
$(a)$ $\frac{4}{3} Al + O_2 \rightarrow \frac{2}{3} Al_2O_3$
$(b)$ $2 Mg + O_2 \rightarrow 2 MgO$

Aluminium is extracted from alumina $(Al_2O_3)$ by electrolysis of a molten mixture of