Ionic compounds have ____ melting and boiling points whereas covalent compounds have _____ melting and boiling point.
Explain the following :
(a) Electrovalent compounds conduct electricity in molten or aqueous state.
(b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.
(c) Atoms combine by transfer and sharing of electrons (s).