The metals found in different parts of Nepal are:
a. Iron ----------> Lalitpur, Bhojpur, Ramechap.
b. Copper ----------> Udayapur, Dhading, Solukhumbu.
c. Gold ---------> Rapti, Mustang, Kathmandu.
d. Magnesium -----------> Udayapur, Dolakha.
e. Cobalt ----------> Palpa, Gulmi.
f. Calcium -----------> Kathmandu, Makwanpur.
g. Bismuth -----------> Makwanpur (Bhimphedi)
h. Lead ----------> Lalitpur, Ganesh Himal (Rasuwa)

Any three alloys in which copper is used are:
a. Brass --------> Cu + Zn ---------> To make not bolts, tubes, medals, etc.
b. Bronze --------> Cu + Zn + Sn -----------> To make household utensils and coins.
c. Bell metal ---------> Cu + Zn -----------> To make bells and decorative items.

a. Making steel and weapon: (Iron)
b. Making silver paint and body parts of airplanes: (Aluminium)
c. Making fungicides and germicides: (Copper)
d. Making coins and idols: (Silver)
e. Making valuable ornament and medicines. (Gold)

Any three uses are:
a. Iron
> Make different household utensils.
> Catalyst for different chemical rxⁿ.
> Manufacture the steel.
b. Aluminium
>Make different household utensils.
> Make coins, medals.
> Cover of airplane, rocket, etc.
c. Copper
> Make electric wires and cables.
> Make coins and medals.
> Make household utensils.
d. Silver
> Make jewelry and other valuable ornaments.
> Make coins, medals, idols, etc.
> Make silver plating.
e. Gold...

The process of reacting hydrochloric acid (Hcl) and sulphuric acid (H₂SO₄) in the ratio of (3:1) is called aquaregia.
Calaverite element is found in aquaregia that dissolve gold.

The order is given below:
Aluminium, silver, gold, copper, iron.

When iron reacts with air (oxygen), some chemical rxⁿtake place at normal temperature to form rust.

a. Haematite: Iron
b. Bauxite: Aluminium
c. Argentite: Silver
d. Cuprite: Copper
e. Calaverite: Gold

a. Iron:
> It is good conductor of heat.
> Its specific gravity is 7.86.
> It is malleable and ductile.
b. Aluminium:
> It is good conductor of heat and electricity.
> its specific gravity is 2.7.
> It is highly malleable and ductile.
c. Copper:
>It is good conductor of heat and electricity.
> its specific gravity is 8.95.
> It is malleable and ductile.
d. Silver:
> It is good conductor of heat and electricity.
> its specific gravity is 10.5.
>...

a. Iron: Haematite (Fe₂O₃)
b. Aluminium: Bauxite (Al₂O₃ . 2H₂O)
c. Copper: Copper phyrite "chalcopyrite" (CuFeS₂)
d. Silver: Argentite (Ag₂S)
e. Gold: Alluvial sand/soil

Iron is extracted by the following ways:
> It is extracted from haematite ore.
> it is collected from ore mines and crushed into fine powder.
> Non-magnetic dirts are separated by the electromagnetic separation method.
> Finally molten iron is obtained and further purified.

Iron is of the reactive metals. So, it doesn't occur in free state in nature. It forms different types of compounds like oxides sulphides, chlorides, hydroxides, carbonates, etc. A little amount of iron is present in haemoglobin of our blood.

The process by which we can get pure metals from their ores id called metallugary.

i. Minerals and Ores.

Metals are elements which form electropositive ions by losing electrons.
For eg. Iron, copper, gold, etc.