By which method is aluminum metal obtained by the reduction of alumina?

In a blast furnace,what prevents the oxidation of molten iron?

What happens to potassium and sodium if they are kept in the open? Why are they immersed in kerosene?

Generally,non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

During the extraction of metals,electrolytic refining is used to obtain pure metals.
$(a)$ Which material will be used as the anode and cathode for the refining of silver metal by this process?
$(b)$ Suggest a suitable electrolyte as well.
$(c)$ In this electrolytic cell,where do we get pure silver after passing an electric current?

Which process is used to convert vegetable oil into vegetable ghee?