Question
Give the comparison between Electrovalent (or ionic compounds) compounds and covalent compounds (special reference to properties).
Solution
| Electrovalent compounds | Covalent bonds |
1. They are formed by the complete transference of one or more electrons from one atom to another.  |
1.They are formed by the mutual sharing of electrons between two atoms. |
| 2. Exist as hard crystalline solids. | 2. Exist as gases, liquids or soft solids. |
| 3. Crystals are made up of ions. | 3. Crystals are made up of molecules. |
| 4. High melting and boiling points. | 4. Low melting and boiling points. |
| 5. It is a bad conductor of electricity in a solid state but conducts electricity in the molten state or in solution. | 5. Bad conductor of electricity |
| 6. Soluble in polar solvents, insoluble in non-polar solvents. | 6. Soluble in non-polar solvents, insoluble in polar solvents. |
| 7. Reactions are fast. | 7. Reactions are slow. |
| 8. Reactions are slow. | 8. Exhibit isomerism. |
