what is the difference between electrovalent and covalent bond?
the basic diff is that electrovalent bonds consist of ions, while covalent bonds do not :
...........TRANSFER of one or more electrons from one atom to the other forms Electrovalent bonds.
...........MUTUAL SHARING of one, two or three pairs of e- b/w 2 atoms forms Covalent bonds.
Electrovalent bonds are usually formed between a metal and a non-metal, while covalent bonds are formed between 2 non-metals :)