L2 : Metallurgy Overview - Isolation of Elements, Chemistry, Class 12 Video Lecture

hello friends this video on isolation of
elements part 2 is brought you by exam
fear calm no more fear from exam will
not talk 1 if you see for the typical of
over extraction because the steps
involved please pay attention here the
first step is the concentration of or as
I told here we remove the unwanted
particles there is no chemical process
if more of physical process right
physical process so here if you see
these the prominent in the black where
the mud sand and other particles you
just remove those particles but you
still have the rocks not she is all
rocky but you remove most of the
unwanted particles right sand clay
etcetera and this process called
concentration also called dressing or
benefaction will talk for about this
this is more physical property physical
process where we take the advantage of
difference in the physical property
between the metal and the
unmodern particles the next thing before
is the isolation of metal from its
concentrated hole here we create impure
metal you see what you get is this is
impure matter it's even pure but still
it looks like metal bits impure metal
from the or this is or this is
concentrated over and it is raw or it so
you got raw or directly from the earth
crust
you may call me a varied concept or head
and then you made impure metal out of
that and to do this we need a chemical
process so generally we convert oxide
I mean oxide directly to metals or we
you convert sulfides and carbonates to
oxide and then to metal or we use
electrochemical process so we talk about
these things somewhat of a chemical
process
and the next is once we have got an
impure metal we want to purify it to
make it pure this is pure material right
so to purify we use very a process such
as distillation liquation liquor license
jewelry firing vapor phase refining
chromatographic methods so all these
methods are used for purification so
typically this is what we will see the
whole chapter first we'll get the raw
ore which will have lot of impurities
we'll use some physical process to make
it concentrated and the physical process
can be normal washing a magnetic
separation of rotation or leaching very
take advantage of solubility we'll talk
about these things so once you get the
concentrated or you try to regenerate or
get the impure metal first by using
chemical process once we have put the
impure metal we can purify it using
various process okay thank you
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