NEET Chemistry Environmental Chemistry Revision Notes

Here is the NEET Chemistry Environmental Chemistry Revision Notes for your studies. Use these Full Course Environmental Chemistry revision notes, created by professional educators for the 2026-27 academic term. They make difficult ideas very easy to understand and focus on core definitions, helping Full Course students prepare quickly before exams.

Key Concepts & Revision: Full Course Environmental Chemistry Environmental Chemistry

Check out these Full Course Environmental Chemistry Environmental Chemistry notes to study important concepts in very little time. These concise summaries target difficult questions and scoring chapters, helping you perform better in school exams and final tests.

Full Course Environmental Chemistry Environmental Chemistry Concept Notes

Environmental Chemistry

Components of Environment:

• Atmosphere: This comprises a blanket of gaseous layer around earth. 
• Hydrosphere: This comprises about 96% of earth’s surface & includes all sources of water like oceans rivers lakes, glaciers, ground water etc. 
• Lithosphere: It refers to earth’s solid crust containing the outer mineral cover. It comprises soil, minerals, organic matter etc. 
• Biosphere: It refers to the domain of living organism in covalent with atmosphere hydrosphere as well as lithosphere.
 
Environmental Pollution :
 
Process of contamination of the environment with harmful wastes arising mainly from human activities.
 
• Pollutant: Any substance or species produced either by a natural source or by human activity, which produces adverse effect on the environment.
• Contaminant: A substance which does not occurs in nature but is introduced by human activity into the atmosphere affecting its composition.
• Source: The site from which the pollution or contaminants originate.
• Sink: The material or medium which consumes or interacts with a long lived pollutant is called sink.
• Receptor : Anything that is affected by the pollutants.
• Threshold limit value (TLV) : This indicates the permissible limit of a pollutant in atmosphere to which a healthy worker is exposed during hours a day or 40 hours a week for life time without any adverse effects. TLV are determined by experimentation on animals, by use of medical knowledge, epidemiology surveys & environmental studies.
 
Tropospheric pollution or Air pollution:

It is the atmosphere condition in which the presence of certain concentration produce harmful effects on man and his environment. These substances include:

Primary pollutants :
 
Particulate Matter Inorganic gases Secondary
NEET Chemistry Environmental Chemistry Revision Notes
NEET Chemistry Environmental Chemistry Revision Notes-1
NEET Chemistry Environmental Chemistry Revision Notes-2
 
Particulate matter:
• Soot
• Metal particles
• Metal oxides .
• Lead salts
• Fly ash
• Asbestos dust
• Solid Hydrocarbons
• Dust Particulates
• Acid mist.
 
Harmful effects of particulates 
 
• Effect on human beings: Affect the human respiratory system & cause several respiratory illnesses. The particles with small size are more harmful in this context. The particulates in fact, become the carriers of the toxic substances from the atmosphere to the human & cause big health hazards.
 
• Effect on visibility: Particulates in the atmosphere cause scattering & absorption of sunlight & reduce the visibility.
 
• Effect on Materials : The adverse effect of particulates on materials include corrosion of metals (when the atmosphere is humid), erosion & soiling of building, sculptures & painted surfaces & soiling of clothes & draperies.

Stratospherical Pollution: (ozone layer & its depletion):

Role of Ozone Layer: protecting earth from the UV radiation coming from the sun. Depletion of Ozone Layer : The equilibrium between formation & destruction of ozone has been upset by influx of several substances into the atmosphere which react with ozone to destroy it.

Effect of Depletion of Ozone layer: The influx of UV radiation reaching the surface of earth would increase which would increase in risk to skin cancer due to exposure to UV radiation, UV radiations also tend to damage the immune system.

Acid Rain:

SO2, nitrogen oxides & acidic soots. Sulphurdioxide & nitrogen dioxide interact with water vapours in presence of sunlight to form sulphuric acid & nitric acid units.

Green House Effect & Global Warming:
 
The green house gases (CO2, CH4, O3, CFC’S ) in the atmosphere form a thick cover around the earth. About 75% of the solar energy reaching the earth is absorbed by the earth surface. The IR radiations coming from sun are not absorbed by atmospheric gases but Earth absorbs these IR

radiations of short wavelength. As a result of this the temperature of earth stands rising. Eventually, earth starts emitting infrared radiations of longer wavelengths. The partially radiated infrared radiations from the earth are absorbed by the greenhouse gases. This results in excessive heating of Earth’s atmosphere. Thus the greenhouse gases add to the heating of atmosphere. This causes global warming. The atmosphere traps the sun’s heat near earth’s surface and keeps it warm. The reemission of the earth’s energy absorbed by CO2 and other greenhouse gases present near the earths surface and its radiation back to the earth is called green house effect.

Advantages of green house effect :

• It is necessary for evaporation of water, formation of clouds, rainfall etc.

• The warm atmosphere helps in rapid growth of plants, trees etc. Harmful effects of green house effect :

• High temperature of atmosphere may melt polar ice caps which are likely to raise the level of sea thereby sinking most of the coastal areas and causing large scale destruction.

• The high temperature may reduce crop product.

• The high temperature will reduce work efficiency of human being.

• Tropical rains and hurricane will become more frequent and also stronger causing more devastation.

• The change in ocean temperature will adversely affect the warm life.

Water Pollution:

NEET Chemistry Environmental Chemistry Revision Notes-3

 

Biochemical Oxygen Demand (BOD) : The measure of the total contamination caused by compounds which can be oxidised in the presence of microorganisms. The BOD is taken as a realistic measure of water quality – clean water would have a BOD value of less than 5 ppm whereas highly polluted river water could have a BOD value of 17 ppm or more.

Land Pollution :

Caused by pesticides and other chemicals which are added to the soil to grow better crops.

Insecticides are the pesticides used to Control of insects by insecticides helps to curb disease and protect crops. Organo chlorines are a group of compounds which have been developed and used as insecticides.Examples: DDT (dichlorodiphenyl trichloro ethane) organo chlorines are stable in the environment, toxic to insects in small amounts, but much less go to humans, and because they are organic compounds not very soluble in water. The advantage of these insecticides is that, bring persistent
 
Fungicides are the pesticides used to check the growth of fungi. Fungi, are plants without chlorophyll, they cannot use solar energy for preparing their food. They live as saprophytes on decaying organic matter or as parasites at the expense of living organisms. Hence they are considered to be a threat to human interests

 

Free study material for Chemistry

Download NEET Revision Notes: Full Course Environmental Chemistry

Key Concepts & Summary for Full Course Environmental Chemistry Environmental Chemistry

Utilize these Revision Notes for Environmental Chemistry to accelerate your exam readiness. Formatted under recent NEET guidelines for Full Course, these summaries focus on critical curriculum components. Regular revision of these core points leads to superior performance in school tests.

Core Chapter Summary & Practice Sets for Environmental Chemistry

Built strictly from the official NCERT book for Full Course Environmental Chemistry, these summaries highlight vital concepts. Reviewing the chapter overview should be followed by studying our professional NCERT solutions for Full Course. Cross-checking your comprehension with our expert answers ensures absolute mastery over Environmental Chemistry.

Boost Exam Confidence with Full Course Environmental Chemistry Practice

To excel in your evaluations, learners should also tackle the MCQ questions and practice worksheets available on this page. These additional solved exercises verify your mastery over Environmental Chemistry concepts. Every learning aid online is free and synchronized with current Environmental Chemistry exam trends. Reviewing these revision notes daily builds confidence and drives better scores.

FAQs

Where can I download the latest PDF for NEET Chemistry Environmental Chemistry Revision Notes?

You can download the teacher prepared revision notes for NEET Chemistry Environmental Chemistry Revision Notes from StudiesToday.com. These notes are designed as per 2026-27 academic session to help Full Course students get the best study material for Environmental Chemistry.

Are these Environmental Chemistry notes for Full Course based on the 2026 board exam pattern?

Yes, our NEET Chemistry Environmental Chemistry Revision Notes include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Environmental Chemistry principles which is important for getting more marks in 2026 NEET exams.

Do these Full Course notes cover all topic-wise concepts for Environmental Chemistry?

Yes, our NEET Chemistry Environmental Chemistry Revision Notes provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of NEET syllabus in Full Course is covered.

How can I use NEET Chemistry Environmental Chemistry Revision Notes for quick last-minute revision?

These notes for Environmental Chemistry are organized into bullet points and easy-to-read charts. By using NEET Chemistry Environmental Chemistry Revision Notes, Full Course students fast revise formulas, key definitions before the exams.

Is there any registration required to download Full Course Environmental Chemistry notes?

No, all study resources on StudiesToday, including NEET Chemistry Environmental Chemistry Revision Notes, are available for immediate free download. Full Course Environmental Chemistry study material is available in PDF and can be downloaded on mobile.