IIT JEE NEET NOTES
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Join for class 11th 12th Boards as well as iit jee neet preparation Contact @Owner_ContactRobot ➼ Premium MATERIALS ➼ Mind Maps / Tricks ➼ DPP's & Notes From Toppers ➼ Best Telegram Channel
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Channel IIT JEE NEET NOTES (@iit_jee_neet_notes1) in the English language segment is an active participant. Currently, the community unites 17 016 subscribers, ranking 12 203 in the Education category and 29 021 in the India region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 17 016 subscribers.
According to the latest data from 01 November, 2025, the channel demonstrates stable activity. Although there has been a change in the number of participants by -172 over the last 30 days and by 0 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 0%. Within the first 24 hours after publication, content typically collects N/A% reactions from the total number of subscribers.
- Post reach: On average, each post receives 0 views. Within the first day, a publication typically gains 0 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 0.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“Join for class 11th 12th Boards as well as iit jee neet preparation
Contact @Owner_ContactRobot
➼ Premium MATERIALS
➼ Mind Maps / Tricks
➼ DPP's & Notes From Toppers
➼ Best Telegram Channel”
Thanks to the high frequency of updates (latest data received on 02 November, 2025), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Education category.
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17 016
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✍️Notes on 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:
(i) Gases such as oxides of sulphur, CO, oxide of N2 and hydrocarbons
(ii) Particulate matter such as dust, smoke, fumes etc.
(iii) Radioactive material & many others.
➖Primary pollutants : These are the pollutants which are emitted directly from the sources. Some examples are:
➖Particulate Matter : Such as ash, smoke, dust, fumes etc.
➖Inorganic gases : Such as sulphur dioxide, carbon monoxide etc.
🔹Particulate matter:
➖Soot: produced by incomplete combustion of carbonaceous fossils fuels such as coal, fuel oil, natural gas, wood etc in insufficient supply of oxygen.
➖Metal particles: These are released by various metal finishing operation. The micro particles of toxic metal & SO2 gas present in the polluted atmosphere get absorbed on the particles rendering them highly toxic.
➖Metal oxides : They are generated by combustion of fuels containing metallic compounds.
➖Lead salts: Their source is lead tetraethyl (Pb(C2H5)4) which is added to gasoline to improve its antiknock property. In order to avoid deposition of PbO suitable amounts of C2H4Cl2 & C2H4Br2 are added to gasoline along with Pb(C2H5)4.
➖Fly ash: It originates from the combustion of high ash fossil. It contains partially burnt particles of the fuels.
➖Asbestos dust: It originates from industrial units manufacturing asbestos sheets, gaskets ropes etc. Asbestos flowing & asbestos insulations also contribute towards asbestos dust in the atmosphere.
➖Solid Hydrocarbons: These are emitted from petroleum refineries & comprise of paraffins, olefins & aromatics.
➖Dust Particulates: Originate from natural, domestic, industrial or agricultural sources. These are thrown into atmosphere by volcanic eruptions, blowing of dust by wind, mining operations etc.
➖Acid mist : Sulphuric acid mist is produced when SO3 present in the atmosphere comes in contact with moisture. Nitric acid mist is produced when oxides of nitrogen, viz, NO & NO2, undergo the series of reactions in the atmosphere.
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Animal Kingdom
NEET PYQS
Notochord
✓Notochord is a mesodermally derived rod
like structure formed on dorsal side
(During embryonic development)
✓Animal with notochord (Chordata)
✓Animal without notochord (Non Chordata)
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