Although metals form basic oxides,which of the following metals form an amphoteric oxide?

$(i)$ Name a metal which does not stick to glass.
$(ii)$ Name the metal which is commonly used in thermite welding.
$(iii)$ What is the nature of zinc oxide?

During the refining of copper by electrolysis,copper deposits at the $....$.

What is the molecular formula of sodium aluminate?

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

$A$ metal $M$ forms an oxide having the formula $M_{2}O_{3}$. It dissolves in both dilute sulphuric acid and dilute sodium hydroxide solution. Identify the metal and write the chemical equations for the reactions involved.