Which of the following is obtained as a slag during the extraction of iron from iron oxide?

Write a note on wrought iron.

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

The cyanide process of gold extraction involves leaching out gold from its ore with $CN^{-}$ in the presence of $Q$ in water to form $R$. Subsequently,$R$ is treated with $T$ to obtain $Au$ and $Z$. Choose the correct option$(s)$.
$1$. $T$ is $Zn$
$2$. $R$ is $[Au(CN)_2]^-$
$3$. $Z$ is $[Zn(CN)_4]^{2-}$
$4$. $Q$ is $O_2$

Which flux is used to remove $SiO_2$ impurity?

To obtain chromium from chromic oxide $(Cr_2O_3)$,the method used is