Separation of substances 001 Video Lecture - Class 11

now we will discuss about the methods of
separation
methods of separation
first matter is handpicking
handpicking matter this method can be
used for separating slightly larger
sized impurities like the piece of dirt
stone husk from the rice or pulses can
be used to remove
particles of impurities
like Tone has dirt etc from weed rice or
pulses in this method we pick the
particles of impurities by hands so this
method is known as handpicking in this
method
we pick the particles by hand so this
method is known as hand picking method
now the second method is threshing
this method is used to separate grain
from stop this method is used to
separate
grain from storms in this method
has been bitten and now grain seeds will
fail from stops in this method we begin
in the stocks and the grain seeds will
free from the stop crushing can be done
by help of bullets can be done by Hal of
bullocks and also can be done by machine
in this method we start we be done the
stocks and the grain particles or green
seeds will free from the stops now third
one is winnowing
this method is used to separate heavier
and lighter components of mixture by
bend of by blowing air this method is
used to separate heavier and
leider components
of a mixture by
views of veld or by blowing air this
method is used to separate lighter husk
particles from the heavier seeds of
grain is used to separate lighter husk
particles
from
heavier seeds of green
in this method we use crane plus husk
suppose this a particles of grains
and is a particle of husk initially
these two are mixed with each other so
we can show this like this this is the
particle of us
and this is a particle of grains
here we use wind suppose we flow the
winds from here suppose this is a win
now we drop the grain and hus particles
from top to bottom we drop these
particles from top to bottom just like
this particle of bead plus husk as wind
blow from these particles when carry the
particles off us because it is very
lighter to wind carry the particles of
husk so we can denote husk particle here
with when so we can say that here only
husk particle present but the particles
of grains is heavier than hus particles
so they will be dropped down so we can
say that here itself heap of grain
particles will collect it will collected
here that is a particles of green and
the particles of husk we'll be there in
thing that is a particle of husk so we
considered particles of grain and
particles of husk has been separated by
faith now next method see
ceiling is a motional method to separate
heavier particles from lighter particles
or we can say that big particles from
small particles sieving removes
particles of stones stocks and husk that
may still remain with beat after rushing
and winnowing so we can say that saving
so we can say that sieving removes
pieces of stones talk and husk that may
still remain
with beamed after washing and winnowing
so we can say that it is compulsory
through you sieving after threshing and
winnowing because there are some
particles have been left after thrashing
and renewing so there is a need to
remove these particles from grain
particles so in order to remove these
grain part are these particles there is
huh Spartacus stone particles and stalks
from grain we should utilize ceiling
sieving is done by saves which are used
in different fields sieving is done by
seeds which are used
in different field
ceiving is also used at construction
sites to separate people's and stones
from sand saving is also used to
separate the door stone particles from
flow so we can say that ceiling is used
to separate pebbles and stones from sand
at construction sites and it is also
used to separate
stone and dirt particles from flow
in see there is a some pores or some
holes preside see use the structure of C
is just like this here we can say that
this type of a structure is present in
see
and
force or holes which are present in seas
and the size of holes is depend on our
requirement so we can say there are lot
of types of C is present but to be ship
we can use them as our requirement
suppose this is a particle of sand which
are very small these are particles of
sign
now suppose these are big particles off
suppose these are a big particles of
stones which are present in sand and
there is a need to separate these stone
particles from said now we use perceives
whose whole size is order of these sand
particles or we can say that the whole
size is too small then these stone
particles so now we use the sieve here
now we use the see here
now this is a structure of see we are
utilized which we are utilizing two
separate stone particles from
sand particle
as we are seeing that the pore size is
hole size of saved is too small than the
size of stones so stone particles cannot
pass through from these see this see but
the particle size of sand is too small
and it can easily pass through from this
scene so when we dropped these mixture
of sand and stone on seal the particles
of sand pass through from the sieve and
we can collect it here particles of sand
can pass from this seal and we can
collect this particle from the bottom
side of sea but the particles of stone
will embed it in these holes or we can
say that they cannot pass through from
seeds so we will get stoned particles on
the thieves or upper side of the sea and
the particles of sand has been passed
true from it seem so we can say that the
particles of sand and particles of stone
has been separated now this is a method
of sieving in which bigger particles is
collected over the sieve and smaller
particles pass through from the sea and
we can collect it to the bottom side of
the sea