In metallurgy,aluminum acts as a .....

In the smelting of iron,which of the following reactions takes place in the blast furnace at $400\,^{\circ}C - 600\,^{\circ}C$?

The compound$(s)$ that is(are) removed as slag during the extraction of copper is:
$1. CaO$
$2. FeO$
$3. Al_{2}O_{3}$
$4. ZnO$
$5. NiO$
Choose the correct answer from the options given below.

Which of the following metals is obtained by the leaching process using a solution of $NaCN$ and then precipitating the metal by the addition of zinc dust?

The temperature at which carbon reduces $FeO$ into iron and produces $CO$ is:

In the extraction of iron from haematite,the impurity $(x)$ of the ore is removed in the form of '$y$'. What are $x$ and $y$ respectively?