[3 Mark Question Answer]

Question 13 Marks

Give four differences between metals and non-metals with reference to their:

Answer

	Metals	Non-Metals
Melting point and boiling point	Metals have both high melting points and boiling points.	Non-metals have both low melting and low boiling point.
Conductivity of heat and electricity	They are good conductors of heat and electricity.	Nofi-metals are bad conductors of heat and electricity
Malleability	Metals are usually malleable.	All non-metals are non-malleable.
Solubility	Metals are generally insoluble in water and other organic solvents.	They are both soluble and insoluble

Question 23 Marks

State any five physical properties of a non-metal.

Answer

Physical properties of a non-metal :

State :Non-metals are generally gases at room temperature.
Hardness :Non-metals are not hard (being gases). In case of solid non-metals, they are hard but brittle in nature.
Conductivity :Non-metals are poor conductors of heat and electricity except graphite.
Malleability :Non-metals are non-malleable, i.e., they cannot be drawn into sheets.
Ductility:Non-metals are non-ductile, i.e., cannot be drawn into wires.

Question 33 Marks

State any five physical properties of a metal.
Physical properties of a metal :

Answer

State :Metals are generally solid at room temperature. Mercury and gallium are liquid metals.
Hardness :Metals are generally hard.
Conductivity :Metals in general are good conductors of heat and electricity. Bismuth and tungsten are exceptions.
Malleability :The property by which metals can be beaten into sheets is called malleability. Metals are generally malleable.
Ductility :Metals are generally ductile i.e., can be drawn into wires.

CHEMISTRY [3 Mark Question Answer]