Question

GIVE REASON:
1.Ionic compounds have high melting point.
2.Ionic compound are soluble in water.
3.Ionic compounds are hard solids.
4.Ionic compounds do not conduct electricity in solid state.
5. Sodium is kept immersed in Kerosene oil.
6. Calcium and Magnesium floats on water.
7. Hydrogen gas is not obtained when a metal reacts with conc. nitric acid.
8. Aluminum is a highly reactive metal, yet it is used to make utensils for cooking.
9. Ionic compounds conduct electricity only in molten or aqueous state.
10.Copper is used to make hot water tanks and not steel.
11. Tarnished copper vessels are cleaned with tamarind or lemon juice.
12. Iron articles are galvanized.
13. Metals loses electrons.
14. Non-metals gains electrons.
15.Aluminium does not corrode easily.
16. When calcium metals is added to water the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire.
17. Metallic oxides are basic in nature.
18.Ionic compounds are soluble in polar solvents like water and insoluble in nonpolar like benzene.

Answer 1

Answer:

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