Question
Taking $MgCl _2$ as an electrovalent compound, $CCl _4$ as a covalent compound, give four difference between electrovalent and covalent compounds
| $MgCl_2$ - Electrovalent compound | $CCl_4$ - Covalent compound |
| They are hard crystalline solids consisting of ions. | These are gases or liquids or soft solids. |
| They have high melting and boiling points. | They have low melting and boiling points. |
| They conduct electricity in the fused or aqueous state. | They do not conduct electricity in the solid, molten or aqueous state. |
| These are soluble in inorganic solvents but insoluble in organic solvents. | These are insoluble in water but dissolve in organic solvents. |
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| Compound | Formula |
| 1. Boric acid | i. $NaOH$ |
| 2. Phosphoric acid | ii. $SiO_2$ |
| 3. Nitrous acid | iii. $Na_2CO_3$ |
| 4. Nitric acid | iv. $KOH$ |
| 5. Sulphurous acid | v. $CaCO_3$ |
| 6. Sulphuric acid | vi. $NaHCO_3$ |
| 7. Hydrochloric acid | vii. $H_2S$ |
| 8. Silica (sand) | viii. $H_2O$ |
| 9. Caustic soda (sodium hydroxide) | ix. $PH_3$ |
| 10. Caustic potash (potassium hydroxide) | x. $CH_4$ |
| 11. Washing soda (sodium carbonate) | xi. $NH_3$ |
| 12. Baking soda (sodium bicarbonate) | xii. $HCl$ |
| 13. Lime stone (calcium carbonate) | xiii. $H_2SO_3$ |
| 14. Water | xiv. $HNO_3$ |
| 15. Hydrogen sulphide | xv. $HNO_2$ |
| 16. Ammonia | xvi. $H_3BO_3$ |
| 17. Phosphine | xvii. $H_3PO_4$ |
| 18. Methane | xviii. $H_2SO_4$ |