Q1: Give examples of some metals.
Q2: What do you mean by ductility? Which substances show this property?
Q3: What type of oxides are formed when metals combine with oxygen?
Q4: Why aluminium is nowadays replacing copper for use in electrical cables?
Q5: Explain the role and uses of metals in daily life.
Q6: Name a non metal which conducts electricity?
Q7: Give reason for the following:-
1: Solid sulphur is considered among non metal?
2: Liquid Mercury considered among metals?
Answers
Q1: Iron , Copper , Aluminium, Gold are some examples of metals.
Q2:Ductility is a physical property of a material associated with the ability to be hammered thin or stretched into wire with out breaking. Generally metals show this property.
Q3:Metals form the metal oxides which is basic in nature and turn red litmus to blue when combined with the oxygen.
Q4 :Aluminium is nowadays replacing copper for use in electric cables because aluminium is cheaper than copper and is easily available .
Q5: Metals like iron steel amongst others are the main materials used in construction of the buildings and homes .Another important applications of metals are in electronic.As metals are good conductors of electricity, they are used to make wires and parts of equipment and gadgets that function on electrical current. In this way there are many uses of metals in our daily life . Metals plays an important role in the ones life.
Q6:Graphite is the only non metal which conducts electricity.
Hope it helps you..
Q1- some metals are iron ,copper,magnesium, sodium
Q2- Ductility - is a property of a metal which allow it to beaten into thin sheets without breaking
examples - gold ,copper etc
Q3- metal+oxygen= metal oxides
Q4- As copper is little more expensive than aluminium so nowadays it is used in electrical cables
Q5- (a) used in electronics devices
(b) used in medicines
(c) .used In building construction
(d) uses In jewelry and clothing
Q6 - A non metal which conduct electricity is graphite
Q7- (a) solid sulphur breaks easily when beaten with a hammer
(b) Mercury is classified as a "Transition Metal" as it is ductile, malleable, and is able to conduct heat and electricity.