The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is

Which of the following reactions takes place in the Bessemer converter during the extraction of copper?

In the extraction of copper from its sulphide ore,the slag is formed by adding which of the following?

Which is the most impure form of iron?

The Ellingham diagram for zinc,magnesium,and carbon converting into corresponding oxides is shown below. To make the following reduction process spontaneous,the temperature should be:
$ZnO + C \to Zn + CO$

Statement $(A)$ $Mg$ can reduce $Al_2O_3$ above $1350^{\circ} C$.
Statement $(B)$ $Al$ can reduce $MgO$ below $1350^{\circ} C$.
The correct answer is