Class 8 Exam > Class 8 Videos > L6 : Acid Rain - Air Water Pollution, Science, Class 8
L6 : Acid Rain - Air Water Pollution, Science, Class 8 Video Lecture
FAQs on L6 : Acid Rain - Air Water Pollution, Science, Class 8 Video Lecture
| 1. What is acid rain? |  |
Ans. Acid rain is a type of rain that has a higher acidity level than normal rain. It is caused by the emissions of sulfur dioxide and nitrogen oxide into the atmosphere, which then react with water vapor to form sulfuric acid and nitric acid. These acids are carried by the wind and eventually fall back to the ground as acid rain.
| 2. How does acid rain affect the environment? | |
Ans. Acid rain has detrimental effects on the environment. It can damage forests and vegetation by leaching essential nutrients from the soil and inhibiting plant growth. It also acidifies lakes, rivers, and streams, making the water too acidic for many aquatic organisms to survive. Additionally, acid rain can corrode buildings, monuments, and infrastructure made of limestone or other materials.
| 3. What are the main sources of sulfur dioxide and nitrogen oxide emissions? | |
Ans. The main sources of sulfur dioxide emissions are the burning of fossil fuels, particularly coal and oil, in power plants and industrial processes. Nitrogen oxide emissions primarily come from the burning of fossil fuels in vehicles, power plants, and industrial combustion processes. Agricultural activities, such as the use of fertilizers, can also contribute to nitrogen oxide emissions.
| 4. Can acid rain be prevented or reduced? | |
Ans. Yes, acid rain can be prevented or reduced through various methods. The most effective approach is to reduce the emissions of sulfur dioxide and nitrogen oxide at their source. This can be achieved by using cleaner fuels, implementing stricter emission standards for industries and vehicles, and adopting technologies such as scrubbers and catalytic converters. International cooperation and policies also play a crucial role in addressing the issue.
| 5. How does acid rain impact human health? | |
Ans. Acid rain can indirectly affect human health by contaminating drinking water sources and food crops. When acid rain falls on the ground, it can seep into groundwater or runoff into lakes and rivers, potentially contaminating drinking water supplies. Acid rain can also affect the pH of soil, which can impact the growth of crops and other plants. However, direct health effects on humans from acid rain exposure are relatively rare.
Text Transcript from Video
hello friends this video on air and
water pollution part six is brought to
you by exam four calm no more fear from
exam let's look at acid rain now because
we've have been talking about acid rain
in the last slide so why did we see
about as we all know what is rain rain
is what so the clouds recipe hate and
they fall in the form of rains the water
droplets which fall however clouds they
are nothing but mean that is what we
call as rain now when this rain is
acidic in nature why it is acidic in
nature due to the presence of several
acids like sulfuric acid nitric acid
sulfurous acid so due to the presence of
these acids the rain becomes acidic in
nature and that is when we call it acid
rain now normally in what is not harmful
rain is not harmful but if the inka in
so many poisonous acids then obviously
it becomes harmful now how these acids
are formed as I mentioned in the
previous slides that the sulfur and
nitrogen oxides they react with tiny
water droplets which might be present in
the atmosphere to form sulfuric and
nitric acids so basically what happens
is the Sand Point iopscience
gets converted you sudden few weak acid
or sulfuric acid how by mixing with the
tiny water droplets which is present in
atmosphere similarly the nitrogen oxides
they also react with the tiny water
droplets to form nitric acids and
leaning from these clouds contain these
acids so these assets of ready-made
present in the clouds so when rain comes
from these clouds what happens they fall
as very weak acid what acid rain so
that's how the rain becomes acidic in
nature due to the presence of these
acids so now when we talk about ascetic
nature how do we do how do we know
the rain is acetic in nature forget
about the rain how do we know that an
aqueous solution in his pollution is
acetic in nature or basic in nature so
basic is just opposite of acetic so when
we say your solution is acetic when it
has aesthetic nature in its when it has
a sense resin in it just the opposite
when there are no assets at all instead
it has basic nature's and then that is
basic so these are the two terms acidic
and basic now in order to measure it or
in order to specify the acidity of a
solution there is a numeric scheme which
is used in chemistry and that scale is
got a pH so pH denotes whether a
solution is acidic or basic in nature so
the scale of pH is from zero to 14 so
that is the scale of pH so anything
which is towards zero that has a setting
so that's our mission is acidic if its
pH value is towards zero and if its pH
value is towards 14 then that solution
is basic or alkaline alkaline basic
would do the same so that doesn't mean
that only solution with pH 0 will be
actually so any solution which is near
to zero so what does the midway between
0 and 14 that is going to be 7 so if
there is a solution which has pH 7 that
could mean that the solution is Newton
that is it is neither has indeed non
basic so now you can say that any
solution with pH less than 7 is going to
be acetic at any solution with pH
greater than 7 is going to be basic
right so that's the basic meaning of
acidic and basic because now I am using
the term acetic quite often now what
happens is these acids can burn our skin
if it is brought in contact now normally
this ring normally the rainwater which
is not quality' dwith acids
so the normal rain if you look at the pH
value of normal rain so the pH will be
around refiled to say
so that will be the value of normal rate
so that is also slightly a sedate but it
is quite near to neutral so the
Valentine is somewhere here for normal
range but when you try to find out the
pH for acid rain so the pH is around
full so the pH is decreasing that means
it is becoming with this going more
towards acidity now you might say that
the difference is not much here it is 4
and here it is 5 or 6 no it is not that
the rain water turns completely acetic
it becomes slightly acidic due to the
presence of sulfuric acid and nitric
acid but even this slightly acetic green
can become harmful to us in a number of
ways so let us try to see what are the
harmful effects of acid rain it can be a
threat to equate life how because when
rain falls it directly falls on the
water bodies like ponds or lakes or
rivers and in each of these water bodies
a large number of organisms sleep
starting from fish shares small animals
aquatic plants so what happens is when
the rainwater contains such harmful
acids so these acids will fall into the
water as well now when toxic substances
are released into the water the water
also turns acid a and the aquatic
organisms only depend on water to it the
water itself is poisonous so obviously
the Advaitic life might even die so it
is a danger to the aquatic life so that
is one disadvantage it can adversely
affect the plants how that's because for
clam productivity or for crop
productivity we all know how much
important is water so irrigation that is
why we have irrigation so that even if
you do not get rainfall so we will
artificially what are the field so when
it rains and if the rainfall is
and reading poisonous substances so what
is going to happen it might kill all the
crops on the field so that means it can
adversely affect the growth of plants
also due to the presence of harmful
chemicals when this rain water reaches
the soil it might affect the nutrients
which are present in the soil because
such harmful chemicals will mix with
chemically react with the nutrients and
the soil will use the nutrients so the
plants will not get the required
nutrients it can also wash away the
protective covering present of the heaps
of plant because each and every part of
the plant gets exposed to rain fall so
if the rain itself is containing poison
so these poisonous substances can affect
the leaves and their food can affect
photosynthesis because photosynthesis
takes place in peace wash away nutrients
from the soil as I was telling that
since they emit when rain falls it goes
into the soil
it contains harmful substances so the
nutrients might get depleted from the
soil while you put the soil so in that
sense it can what you move this while
and it can also harm the tiny organisms
living inside the soil there are so many
all kinds of Seck earth wants the
decomposers say it can't harm them as
well damaged statues and buildings this
is another important harmful effect of
acid rain so one best example is the
parchment health of Agra which is one of
the seven wonders of the world so what
does the acid rain do as I said these
acids they can even cause erosion they
can corrode some of the stones specially
flying stones or science tuning this
parchment is made up of what it is made
up of marble so Miami is nothing but
calcium carbonate which is nothing but
limestone so this - of carbonate gets
easily impacted by as
so these acids will cause faster erosion
of such rocks and these kind of rocks
are more susceptible to acid rains
so this corrodes the marbles of the
monument and as a result if you look at
the glow of the touch it has
deteriorated a lot if you can see a
blackish appearance on the marble and
that is because of so acid lien is one
of the important reason behind this now
in so that is located in Agra and in
Agra you have a lot of industries and
factories all you find these etc so from
the industrial emission a lot of sulphur
dioxide and nitric oxide Irene leaves
into the atmosphere so in that
surrounding atmosphere a lot of sulfuric
acid and nitric acid gets formed in the
clouds and that is why acid rain is that
result and asitane damages the touch and
these these a lot of preventive measures
are being taken so that it can be
protected from any further damage and
also it began to something some it's
been an example if nations to bring back
the glory and beauty of the culture so
this these are some of the very harmful
effects of acid rain so now we
understand how harmful our industrial
emissions because they cause air
pollution they volume to the air and
that is one way by which they cause harm
to living organisms may also cause acid
rain thank you please visit
www.payoor.com to watch more educational
videos with a better experience please
do not forget to Like and subscribe to
our YouTube channel for latest updates
thank you once again
water pollution part six is brought to
you by exam four calm no more fear from
exam let's look at acid rain now because
we've have been talking about acid rain
in the last slide so why did we see
about as we all know what is rain rain
is what so the clouds recipe hate and
they fall in the form of rains the water
droplets which fall however clouds they
are nothing but mean that is what we
call as rain now when this rain is
acidic in nature why it is acidic in
nature due to the presence of several
acids like sulfuric acid nitric acid
sulfurous acid so due to the presence of
these acids the rain becomes acidic in
nature and that is when we call it acid
rain now normally in what is not harmful
rain is not harmful but if the inka in
so many poisonous acids then obviously
it becomes harmful now how these acids
are formed as I mentioned in the
previous slides that the sulfur and
nitrogen oxides they react with tiny
water droplets which might be present in
the atmosphere to form sulfuric and
nitric acids so basically what happens
is the Sand Point iopscience
gets converted you sudden few weak acid
or sulfuric acid how by mixing with the
tiny water droplets which is present in
atmosphere similarly the nitrogen oxides
they also react with the tiny water
droplets to form nitric acids and
leaning from these clouds contain these
acids so these assets of ready-made
present in the clouds so when rain comes
from these clouds what happens they fall
as very weak acid what acid rain so
that's how the rain becomes acidic in
nature due to the presence of these
acids so now when we talk about ascetic
nature how do we do how do we know
the rain is acetic in nature forget
about the rain how do we know that an
aqueous solution in his pollution is
acetic in nature or basic in nature so
basic is just opposite of acetic so when
we say your solution is acetic when it
has aesthetic nature in its when it has
a sense resin in it just the opposite
when there are no assets at all instead
it has basic nature's and then that is
basic so these are the two terms acidic
and basic now in order to measure it or
in order to specify the acidity of a
solution there is a numeric scheme which
is used in chemistry and that scale is
got a pH so pH denotes whether a
solution is acidic or basic in nature so
the scale of pH is from zero to 14 so
that is the scale of pH so anything
which is towards zero that has a setting
so that's our mission is acidic if its
pH value is towards zero and if its pH
value is towards 14 then that solution
is basic or alkaline alkaline basic
would do the same so that doesn't mean
that only solution with pH 0 will be
actually so any solution which is near
to zero so what does the midway between
0 and 14 that is going to be 7 so if
there is a solution which has pH 7 that
could mean that the solution is Newton
that is it is neither has indeed non
basic so now you can say that any
solution with pH less than 7 is going to
be acetic at any solution with pH
greater than 7 is going to be basic
right so that's the basic meaning of
acidic and basic because now I am using
the term acetic quite often now what
happens is these acids can burn our skin
if it is brought in contact now normally
this ring normally the rainwater which
is not quality' dwith acids
so the normal rain if you look at the pH
value of normal rain so the pH will be
around refiled to say
so that will be the value of normal rate
so that is also slightly a sedate but it
is quite near to neutral so the
Valentine is somewhere here for normal
range but when you try to find out the
pH for acid rain so the pH is around
full so the pH is decreasing that means
it is becoming with this going more
towards acidity now you might say that
the difference is not much here it is 4
and here it is 5 or 6 no it is not that
the rain water turns completely acetic
it becomes slightly acidic due to the
presence of sulfuric acid and nitric
acid but even this slightly acetic green
can become harmful to us in a number of
ways so let us try to see what are the
harmful effects of acid rain it can be a
threat to equate life how because when
rain falls it directly falls on the
water bodies like ponds or lakes or
rivers and in each of these water bodies
a large number of organisms sleep
starting from fish shares small animals
aquatic plants so what happens is when
the rainwater contains such harmful
acids so these acids will fall into the
water as well now when toxic substances
are released into the water the water
also turns acid a and the aquatic
organisms only depend on water to it the
water itself is poisonous so obviously
the Advaitic life might even die so it
is a danger to the aquatic life so that
is one disadvantage it can adversely
affect the plants how that's because for
clam productivity or for crop
productivity we all know how much
important is water so irrigation that is
why we have irrigation so that even if
you do not get rainfall so we will
artificially what are the field so when
it rains and if the rainfall is
and reading poisonous substances so what
is going to happen it might kill all the
crops on the field so that means it can
adversely affect the growth of plants
also due to the presence of harmful
chemicals when this rain water reaches
the soil it might affect the nutrients
which are present in the soil because
such harmful chemicals will mix with
chemically react with the nutrients and
the soil will use the nutrients so the
plants will not get the required
nutrients it can also wash away the
protective covering present of the heaps
of plant because each and every part of
the plant gets exposed to rain fall so
if the rain itself is containing poison
so these poisonous substances can affect
the leaves and their food can affect
photosynthesis because photosynthesis
takes place in peace wash away nutrients
from the soil as I was telling that
since they emit when rain falls it goes
into the soil
it contains harmful substances so the
nutrients might get depleted from the
soil while you put the soil so in that
sense it can what you move this while
and it can also harm the tiny organisms
living inside the soil there are so many
all kinds of Seck earth wants the
decomposers say it can't harm them as
well damaged statues and buildings this
is another important harmful effect of
acid rain so one best example is the
parchment health of Agra which is one of
the seven wonders of the world so what
does the acid rain do as I said these
acids they can even cause erosion they
can corrode some of the stones specially
flying stones or science tuning this
parchment is made up of what it is made
up of marble so Miami is nothing but
calcium carbonate which is nothing but
limestone so this - of carbonate gets
easily impacted by as
so these acids will cause faster erosion
of such rocks and these kind of rocks
are more susceptible to acid rains
so this corrodes the marbles of the
monument and as a result if you look at
the glow of the touch it has
deteriorated a lot if you can see a
blackish appearance on the marble and
that is because of so acid lien is one
of the important reason behind this now
in so that is located in Agra and in
Agra you have a lot of industries and
factories all you find these etc so from
the industrial emission a lot of sulphur
dioxide and nitric oxide Irene leaves
into the atmosphere so in that
surrounding atmosphere a lot of sulfuric
acid and nitric acid gets formed in the
clouds and that is why acid rain is that
result and asitane damages the touch and
these these a lot of preventive measures
are being taken so that it can be
protected from any further damage and
also it began to something some it's
been an example if nations to bring back
the glory and beauty of the culture so
this these are some of the very harmful
effects of acid rain so now we
understand how harmful our industrial
emissions because they cause air
pollution they volume to the air and
that is one way by which they cause harm
to living organisms may also cause acid
rain thank you please visit
www.payoor.com to watch more educational
videos with a better experience please
do not forget to Like and subscribe to
our YouTube channel for latest updates
thank you once again
About this Video
Sep 27, 2025
Last updated
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