Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?


The properties that are given are those of a covalent or network solid. As a result, the solid in question is a covalent or network solid.
Diamond (C) and quartz (SiO2) are two examples of such substances.

Final Answer:-
Covalent or network solid