Which of the following is the mixture used in the thermite process?

Which of the following has the lowest percentage of carbon?

The Bessemer converter is used for the production of:

Which of the following statements is incorrect?

Given are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Magnesium can reduce $Al_{2}O_{3}$ at a temperature below $1350^{\circ} C$,while above $1350^{\circ} C$ aluminium can reduce $MgO$.
Reason $R$: The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements,choose the most appropriate answer from the options given below:

In which of the following isolations is no reducing agent required?