Give reasons : Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
What chemical process is used for obtaining a metal from its oxide ?
$(i)$ Write the electron-dot structures for sodium. oxygen and magnesium.
$(ii)$ Show the formation of $Na _{2} O$ and $MgO$ by the transfer of electrons.
$(iii)$ What are the ions present in these compounds ?
In the electrolytic refining of a metal $M$, what would you take as the anode, the cathode and the electrolyte ?
What are alloys ?
Which of the following pairs will give displacement reactions ?