Heating of carbonate ores in the absence of air to convert them into oxides is known as:

$(a)$ Consider the following chemical equation:
$Fe_{2}O_{3} + 2Al \rightarrow Al_{2}O_{3} + 2Fe$
Name two categories in which you can place this reaction.
$(b)$ Define the term 'Oxidation' of a substance and name the substance oxidised and the oxidising agent in the above reaction.

Which method/process is used to prepare sulphuric acid?

Which of the following are not ionic compounds?
$(i)$ $KCl$
$(ii)$ $HCl$
$(iii)$ $CCl_4$
$(iv)$ $NaCl$

Which process occurs at the anode during the process of electrolysis?

When sulfur dioxide gas is passed through lime water,which insoluble substance is formed that turns the solution milky?