(a) Define non-metal . Give five examples of non-metals.
(b) Name a non-metal which conducts electricity.
(c) Name a non-metal having lustre (shining surface).
(d) Name a non-metal which reacts with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?
(a) Define non-metal . Give five examples of non-metals.
(b) Name a non-metal which conducts electricity.
(c) Name a non-metal having lustre (shining surface).
(d) Name a non-metal which reacts with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?
(a)Nonmetal, a substance that does not exhibit such characteristic properties of metals as hardness, mechanical adaptability, or the ability to conduct electricity.
This classification is generally applied to the chemical elements Oxygen(O), Nitrogen(N), Iodine(I), Chlorine(Cl), Fluorine(F)
(b) Graphite
(c) Iodine
(d)Non-metals react with oxygen to form non-metal oxides. Non-metal oxides are acidic in nature. They turn blue litmus to red.
1)When sulphur burns in air, it combines with the oxygen of the air to form sulphur dioxide (acidic oxide)
S(s)+O2(g)⟶SO2(g)
Sulphur dioxide dissolves in water to form sulphurous acid solution
SO2(g)+H2O(l)⟶H2SO3(aq)
Sulphurous acid turns blue litmus to red showing it is an acid and that sulphur dioxide is acidic in nature.
If an element forms a basic oxide, then the element will be a metal.
If an element forms an acidic oxide, then the element will be a non-metal.
The metal oxide is basic in nature and form bases on dissolving in water.
Non-metals are acidic in nature and form acids on dissolving in water.
(a)Nonmetal, a substance that does not exhibit such characteristic properties of metals as hardness, mechanical adaptability, or the ability to conduct electricity.
This classification is generally applied to the chemical elements Oxygen(O), Nitrogen(N), Iodine(I), Chlorine(Cl), Fluorine(F)
(b) Graphite
(c) Iodine
(d)Non-metals react with oxygen to form non-metal oxides. Non-metal oxides are acidic in nature. They turn blue litmus to red.
1)When sulphur burns in air, it combines with the oxygen of the air to form sulphur dioxide (acidic oxide)
S(s)+O2(g)⟶SO2(g)
Sulphur dioxide dissolves in water to form sulphurous acid solution
SO2(g)+H2O(l)⟶H2SO3(aq)
Sulphurous acid turns blue litmus to red showing it is an acid and that sulphur dioxide is acidic in nature.
If an element forms a basic oxide, then the element will be a metal.
If an element forms an acidic oxide, then the element will be a non-metal.
The metal oxide is basic in nature and form bases on dissolving in water.
Non-metals are acidic in nature and form acids on dissolving in water.
