L1 : Chemical Reaction - Chemical Reaction, Science, Class 10 Video Lecture - Class 12

hello friends this video on chemical
reactions and efficient part 1 is
brought you by exam viacom no more fear
from exam what we will study we will
study chemical reactions chemical
equations and types of chemical
reactions the first question that comes
to our mind is why we surely chemical
reaction before I before I introduce you
the actual definition of chemical
reaction let's look in the real life
scenario option C of chemical reaction
you have this food you keep this food in
the room temperature for let suppose 30
days right after 30 days it smells you
feel that you you'll feel it smell
coming out right
everything gets rotten hey this guy get
rotten fungus comes here again this
smells a lot why this smells because
there is a reaction it happens in the
food and the smell is produced
this is record of a chemical reaction
that happens in the food if you keep the
food for a long time the medicines which
you take these medicines have some
reaction in your body and then you feel
better for example if you have headache
you take some medicines and then after
some time you feel better because these
medicines react with the body and she
has some effect if you see this tree how
it dries food is it takes this light it
takes the sunlight it takes the
chlorophyll it has and then it produce
food for its own right if you see this
is also a reaction photosynthesis if you
have learnt in your biology classes I
think right so it's said that this is
nothing wonder reactions chemical
reaction happens where you have this
light and chlorophyll and then which
produce the plant produce food this is
also one example the chemical reaction
we breathe we breathe air right we
breathe air and this air is used just
for survival
how this food which we eat on that be
order every rock fission and we get
energy and this oxygen we get from
respiration but if you see this is a
chemical reaction you have food you take
oxygen and you add you get energy this
is example of one chemical reaction if
you see the battery is normal the
lithium battery or zinc matter which
works the chemical reaction happening at
the positive end at the negative end
here oxidation and reduction happen will
tell you what oxygen reduction is
understand to some chemical reaction
happens and that chemical reaction
produce the electrical energy in the
battery also if you see the iron I don't
think you have after some time it get
rust and this is rusting is nothing but
a reaction so we have an iron iron
reacts with oxygen and it produced the
rust right you have any ions of chance
you keeping outside your home for 1020
days you see that things got busted so
this is also one chemical reaction that
happens the food we eat the food we eat
is digested how it is done this body
produce hydrochloric acid and this takes
the food and it digests the food so this
everything is nothing but a chemical
reaction the digestion of food digestion
of food is nothing but a chemical
reaction the car which would drive in
the car we put diesel or petrol
depending on the cholera variety you
have odd petrol or some things now the
values LPG gas ozone right or CNG gas if
you are living in Delhi so whatever few
will be used in fuel buns and produce
energy so this is also bus nothing but a
reaction and happens right you have the
car in the car you burn this diesel
petrol or gas it gives energy so this is
also one reaction correct also it
generates heat
it generates heat also in this case so
what do you observe in these all these
cases right sometimes we get heat as
output sometimes behaves and smell
sometimes the state is changed for
example this was looking good but after
some time the state got change right
state changed it also stayed changed
right don't sometimes there is a state
change sometimes you get the gas out
sometimes you get the heat right so all
these things are characteristic of a
chemical reactions so we observe that
the change of state happen the color
happened the kitchen color happened the
evolution of gas also happened in some
case and the temperature also change in
some of the cases so this is what we
observe in the Isha substance when the
initial substance went for a chemical
reaction so before you even define
chemical reaction let's have some
activity of chemical reactions so what
I'm doing is I'm taking on clean
magnesium ribbon you centimeter long
right and I clean that with sandpaper to
make sure there is no dust or something
and I hold with a pair of Tom's so burn
this using a spirit lamp and collects a
match example this was a mission-driven
you centimeter long first I removed all
the dust using sandpaper and now I'm
holding this I'm bonding this with a
spirit lamp and all this dust which I am
getting right I am collecting else in a
ball so what you see this this guy is
magnesium ribbon this burns with a
dazzling flames
this is born with a dazzling flame right
this some flames comes out darling clean
and it's change into white cotton this
pod work you see the whitening color
this is a whiteboard well if you see
right this is white powder which you get
here
cut
so the reaction if you see here is there
was a magnesium there this guy is a
magnesium oxygen you heart from
surrounding air past there whom he'd
required Ashley so the heat required you
added some head and you got management
set this is one chemical reaction if you
see I'm just repeating it here in this
scenario what we have seen that there is
a magnesium ribbon that God oxygen from
the surrounding we are written it and
anything to that we just had a magnesium
ribbon we heated it up on heating we got
magnesium oxide because this thing white
part is nothing but magnesium outside so
we already know what magnesium is we
have we have fair understanding of the
all the elements a little bit and you'll
have more understanding in class learn
and we learn again this the same class
itself where we'll learn a periodic
table so magnesium is the element we are
when you combine with oxygen you get
magnesium oxide then you heat this so
this is the example of a chemical
reaction that happened where my knee
shoe was converted to oxygen so what is
the chemical reaction whenever a
chemical change occurs please note
whenever a chemical change occurs we see
that chemical reaction has taken its
with that in this case the magnesium was
converted to magnesium oxide correctly
this is the definition of chemical
reaction in the world of condition
example magnesium plus oxygen in
presence of heat converted into
magnesium oxide so initial chemical was
magnesium and oxygen that got cover into
magnesium oxide so the chemical change
happened in this case we call this guy
same direction so chemical reaction
typically has reactant and products for
example the reactant is nothing but the
substantive undergo change and product
is nothing but
the noose of sand that is for example in
this case my magnesium in oxygen is
something which is undergoing change
right so they are reacting a magnesium
oxide is the final output so this geyser
for and they are separated by a line
because this is a chemical reaction will
write a chemical equation for the same
thing and I believe I will write the
chemical equations so magnesium and
oxygen reacts form a product called
magnesium oxide this is a typical
example of chemical reaction where you
have a reactant product we are reacting
it is converted into product thank you
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