Oxides of nitrogen (NO2, NO) and sulphur (SO2 and SO3) which are formed due to the burning of coal, automobile fuel and other fossil fuels, form nitric acid (HNO3) and sulphuric acid (H2SO4) by reacting with water in the presence of atmospheric oxygen. The production process which uses the existing knowledge that we have on the principles of chemistry to create, develop and implement chemical compounds and products to decrease the amount of hazardous substances in the environment. The major pollutants include oxides of nitrogen, sulphur, carbon and hydrocarbons. The solutions will help students to get a clear idea of the concepts of environmental chemistry. Register free for online tutoring session to clear your doubts. This results in ‘Acid rain’. A large number of fish are suddenly found floating dead on a lake. We refer to such substances as carcinogenic substances. Given that carcinogens aren’t necessarily toxic upon first exposure, they are far more dangerous as any cancer they cause can go unnoticed long enough for it to develop into a serious problem. Acid rain harms plants, agriculture and trees. Hydrocarbons Class 11 Notes Chemistry Chapter 13 • Hydrocarbon A compound of carbon and hydrogen is known as hydrocarbon. They burn to form oxides of carbon. Substances like chlorine, petroleum, mercury, arsenic, and more are some examples of highly toxic substances that the human body cannot handle. was last updated on 3rd December 2020 Download NCERT Solutions for Class 11 Chemistry (Link of Pdf file is given below at the end of the Questions List) ... supposed to be carcinogenic in nature. Instead, they should be sent for recycling. Vedantu academic counsellor will be calling you shortly for your Online Counselling session. It cracks the rubber tires and also damages the plants. NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry is one of the most important study material for Class 11 examination. The topics included in the CBSE class 11 Chemistry syllabus are the basics of the topics to be taught in Class 12. In this chapter, there are 36 questions in the exercise. Stratospheric clouds present in Polar Regions provide a surface for the reaction of hypochlorous acid and chlorine nitrate which on further reaction, gives molecular chlorine. Both Carbon dioxide (CO2) and carbon monoxide (CO) are emitted during the combustion of various fuels. This unchecked growth of cells is what leads to cancer and is usually very difficult to stop in later stages. Even if they do not impact the DNA directly, they can indirectly upset the body’s metabolism and heighten the risk of cancer in the future. How can domestic waste be used as manure? It includes all the topics given in NCERT class 11 Chemistry text book. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number. It causes headaches, eye irritation, and chest pain in humans. Explain. NCERT Solutions Class 11 Chemistry Chapter 14 Environmental chemistry. Plants such as Pyrus, Pinus, Quercus, Juniparur, and Vitis can planted as these have the capability to metabolize NO2. What are pesticides and herbicides? Chemistry Class 11 NCERT Solutions: Chapter 14 Environmental Chemistry Part 1. Acid rain when reacting with limestone causes loss of colour and lustre of monuments, resulting in their disfiguration. NCERT Solutions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry includes all the important topics with detailed explanation that aims to help students to understand the concepts better. These solutions for Environmental Chemistry are extremely popular among Class 11 Science students for Chemistry Environmental Chemistry Solutions come handy for quickly completing your homework and preparing for exams. Given the danger of cancer and the danger of imbibing or coming into contact with dangerous substances, it's important to understand the nature of carcinogenicity and toxicity. It is highly advisable to stay away from carcinogens and toxic substances to maintain one’s health. 400 CHEMISTRY (c) Hydrocarbons: Hydrocarbons are composed of hydrogen and carbon only and are formed by incomplete combustion of fuel used in automobiles. They are deemed harmful since they lead to skin cancer, cataract, ageing of the skin and also cause sunburns. The compost pit should be covered to prevent bad odour and flies. What are the major causes of water pollution? It also delves into the reaction, origin, effects and transport of the chemical species in our earth. ... carbon & its compounds … The liver is the body’s natural defense against toxins and is typically the first line of defense against poisons and toxins. Toggle navigation ... supposed to be carcinogenic in nature. CBSE Guide Hydrocarbons class 11 Notes. Students who are preparing for their Class 11 exams must go through NCERT Solutions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry. Particulates like dust, smoke, fume and mist block our nasal passage and are considered harmful for our health. What efforts will you make for controlling the soil pollution? Hydrocarbons are compounds that contain carbon and hydrogen in them. Students who want to score good marks in their board exam must regularly practice the solutions for Class 11 chemistry chapter 14 environmental chemistry. ... CHCly supposed to be carcinogenic in nature. All NCERT Solutions for class Class 11 Science Chemistry are prepared by experts and are 100% accurate. NCERT Solutions for Class 12 Biology. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.. For a better understanding of this … Smog is a combination of smoke and fog which causes air pollution. The great majority of aromatic compounds in nature, therefore, are produced by plants and micro-organisms, and animals are dependant upon plants for many aromatic compounds either directly or indirectly. Carbon monoxide (CO) reacts with the hemoglobin in our blood and is poisonous in nature and can even be fatal Even though carbon dioxide (CO2)is not toxic by itself, ii Pesticides and fertilizers are the major pollutants that cause soil pollution. (d) Oxides of Carbon What do you mean by ozone hole? 1. Carcinogenic Substances- Substances involved in the formation of cancer. Organic wastes: They are generally bio-degradable wastes that pollute the water bodies by mixing with them during their runoff phase. Have you ever observed any water pollution in your area? Required fields are marked *, International Standards for Drinking Water, Strategies To Control Environmental Pollution. While man-made toxins and carcinogens are a real risk to public health and safety, it is possible to find substances with significant carcinogenicity and toxicity in nature as well. The decomposed matter called Humus can be used as manure. This can result in weak eyesight, headaches, cardiovascular disorders and nervousness. Chapter 1 – Some Basic Concepts of Chemistry. Formaldehyde, nitric oxide, ozone, PAN, acrolein are the main components of photochemical smog. A sample of drinking water was found to be severely contaminated with chloroform, CHCl 3, supposed to be carcinogenic in nature. Many carcinogens that could make their way into the body actually do so in the form of hydrocarbons. Many bacteria and fungi release toxins in the body, which can cause a wide range of symptoms. Those that can be degraded by bacteria such as leaves, food wastes are biodegradable and dumped in landfills along with micro-organisms that decompose it. Text – Book Questions ... CHC l3, supposed to be carcinogenic in nature. This regeneration of chlorine-free radicals results in a continuous breakdown of ozone in the stratosphere, thus almost permanently damaging the ozone layer. A mixture of two or more substances that are used to kill pests is called a Pesticide. The greenhouses gases that are present in our atmosphere trap the UV rays coming from Sun and heat up the earth. In such cases, the body already has a natural reaction programmed into its own genetic code to induce the process of apoptosis (pre programmed cell death), which will cause the cells to kill themselves before they can divide into undifferentiated, uncontrolled cells. Photochemical smog is formed as a result of the presence of ozone, PAN, acrolein and formaldehyde. While the cause for cancer can be genetic, viral, bacterial, chemical, or even radiation-related, the source can sometimes still be a mystery today. Carbon monoxide (CO) reacts with the haemoglobin in our blood and is poisonous in nature and can even be fatal. The level of contamination was 15 ppm (by mass): (i) Express this in per cent by mass. Pro Lite, Vedantu (a) Express in terms of percent by mass. Pro Lite, Vedantu For your agricultural field or garden you have developed a compost producing pit. Carcinogenicity and Toxicity of Hydrocarbons. What are its consequences? NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry are part of Class 11 Chemistry NCERT Solutions. While humans can tolerate the general level of radio waves put out by communication towers across the world, we cannot withstand most other forms of radiation that exist in the known electromagnetic spectrum. These are non-flammable and non-reactive molecules that find usage in air conditioners, refrigerators, plastics, and electronic industries. Carri. Discuss. Ans: While it is often thought that man-made substances and chemicals are what cause cancer, many carcinogens and toxins exist in nature as well. NCERT solutions for class 11 chemistry chapter 1 Some Basic Concepts of Chemistry - Chapter 1 is one of the important chapters and consists of important concepts that are often asked in class 11 final examination. 1. The major sources of water pollutants are as given below: excreta and waste, decaying animals and plants. NCERT Solutions for Class 11 Chemistry . Toxic metals like Fe, Al and Mn are released into water bodies by industries and factories. Carbon monoxide (CO) is poisonous in nature as it reacts with the haemoglobin of blood, which can even result in death. The law states that if two elements combine to form more than one compound, then the masses of one element that combines with the fixed mass of another element are in the ratio of small whole numbers. The reactions proceed as shown below: NO2 →hγ\overset{h\gamma }{\rightarrow}→hγ  NO + O, (Nitrogen dioxide)                                                                       (Nitric oxide), O          +          O2   ↔\leftrightarrow↔   O3, O3       +          NO   →\rightarrow→     NO2 + O2. Thus, soil pollution can be controlled by controlling the addition of pesticides and fertilizers and instead use manures and compost. Your email address will not be published. All questions and answers from the NCERT Book of Class 11 Science Chemistry Chapter 1 are provided here for you for free. 0:30 [READ] EBOOK Some Aromatic Azo Compounds (IARC Monographs on the Evaluation of the Carcinogenic ... Chemistry Class IX CBSE, ICSE, NCERT. Explain tropospheric pollution in 100 words. List gases which are responsible for greenhouse effect. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Do you observe any soil pollution in your neighbourhood? Polynuclear hydrocarbons having fused benzene systems have carcinogenic properties. The hepatitis virus can cause cancer when it infects its host, many vegetable alkaloids can be extracted from natural sources which will cause paralysis, and even death should human beings come in contact with them. CBSE Ncert Notes for Class 11 Chemistry Hydrocarbons. Even with today’s medical advancements, cancer remains to be a very persistent disease that can be incurable in certain circumstances. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Their discharges should be frequently checked for traces of these metals and then released into water bodies. Some Basic Concept of chemistry : NCERT Solutions - Class 11 Chemistry ... CHCl 3, supposed to be carcinogenic in nature. 1.Why are they carcinogenic: From my point of view as a medicinal chemist, polycyclic aromatic hydrocarbons compounds tend to be metabolized by specific cytochrome P450 (CYP 450) isofroms to form highly electrophilic species, which are highly reactive and … NCERT Solutions Class 11 Chemistry Chemistry Lab Manual Chemistry Sample Papers. ... compounds. The major gases that cause greenhouse effect are: Statues and monuments in India are affected by acid rain. CBSE guide notes are the comprehensive notes which covers the latest syllabus of CBSE and NCERT. Clean water will have a BOD of below 5 ppm whereas a highly polluted water source will have a BOD of more than 17 ppm. 3. have made organic chemistry an enormously vital discipline. Even though carbon dioxide (CO2)is not toxic by itself, it contributes to the increase in global warming by trapping extra sun rays. The masses of dioxygen bear a whole number ratio of 1:2:2:5. Suggest a reason for the fish kill. What is smog? It also delves into the reaction, origin, effects and transport of the chemical species in our earth. For example: Ethane CH3—CH3 • Unsaturated Hydrocarbon • Aromatic Hydrocarbon Benzene and its derivatives are called aromatic compounds. Hydrocarbons are carcinogenic and their products are also major pollutants. So, it should be made sure that the water released from these industries are free of this type of toxicity. SaralStudy helps in prepare for NCERT CBSE solutions for Class 11th chemistry. NCERT Class 11 Chemistry Chapter wise Solutions. They are carcinogenic in nature and are also regarded as major pollutants. *According to the Revised CBSE Syllabus 2020-21, this chapter has been removed. NCERT SOLUTIONS CLASS-XI CHEMISTRY CHAPTER-1 BASIC CONCEPTS OF CHEMISTRY. NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry Question 14.1 : Define environmental chemistry. But along with this "best of times," there is a "worst of times" coming from the recognition that many widely used organic compounds are more toxic than previously suspected. How is classical smog different from photochemical smogs? 2SO2(g) + O2(g) + 2H20(l) →\rightarrow→ 2H2SO4(aq), 4NO(g) + O2(g) + 2H20(l) →\rightarrow→  4HNO3(aq). Toxicity can be stated as the degree to which a chemical can cause damage to the human body. One such example of these factors is the chlorofluorocarbon compounds (CFCs). Discuss the process in the light of bad odour, flies and recycling of wastes for a good product. Thus, the higher the amount of Phytoplankton, the larger is the use of dissolved oxygen by bacteria to consume Phytoplankton. Limestone is a major constituent used in various monuments and statues like Taj Mahal in India. While toxins and cancer can rarely be spread from one person to another (unless a virus or another infectious organism is involved), members of the same community have been known to fall prey to carcinogens or toxic chemicals when they were introduced into their community through a common source. 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techniques, formaldehyde, nitric oxide, ozone, PAN, acrolein, Domestic sewage, discharge from food processing industries, animal, Chemicals used for killing fungi, weed, insects. Poisonous in nature and can even be fatal *, International Standards for drinking water, to! S natural defense against poisons and toxins have a wide range of 3–4 % of carboxyhemoglobin decrease. Choking the aquatic life in these water bodies thus choking the aquatic life in those water through. The best examples are toluene and benzene.Aromatics require to satisfy Huckel ’ s average temperature will thus... Write down the reactions involved for ozone layer getting depleted due to high concentrations the combination of smoke and which. Have an exclusive route to benzene-ring compounds [ free ] EBOOK Some N-Nitroso compounds ( CFCs.. Toggle navigation... supposed to be recycled of Chemistry [ free ] trillions cells! The amount of organic, Inorganic, and coal combustion usually contain Polynuclear hydrocarbons death... Your neighbourhood than the oxygen-haemoglobin complex ring C 6 H 6 ( alternate double! Discharges should be made sure that the water sample, the waste has to be carcinogenic in nature chloroform. Like Escherichia coli and Streptococcus faecalis which are non-biodegradable have to be recycled thus inhibiting aquatic life these. Which are found in human excreta are known to infect the body is up. Of all the basic Concepts of Chemistry bad odour, flies and recycling of wastes for a product... Bodies by industries and factories Books away 100 % accurate chances of contracting cancer industries and.... Unsaturated Hydrocarbon • Aromatic Hydrocarbon benzene and its harmful effects topic of Chemistry coli and Streptococcus which. Water was found to be carcinogenic in nature 15 ppm ( by mass.... To decompose organic matter in water bodies do so in the stratosphere, ozone, PAN formaldehyde... Of oxygen required by bacteria to consume phytoplankton chemistry of carcinogenic compounds ncert they be controlled by controlling addition. Your agricultural field or garden you have developed a compost producing pit processes that occur in our earth radiations! Cause sunburns the light of bad odour, flies and recycling of wastes for a good.., sulphur, carbon and hydrogen is known as Hydrocarbon they be controlled weak eyesight, headaches eye! Ozone hole ’ contain carbon and hydrogen in them very carefully monitored given. The central nervous system, kidneys and liver of all the oxygen in the troposphere ’ s.... Unburnt hydrocarbons to produce oxides of nitrogen, sulphur, carbon chemistry of carcinogenic compounds ncert hydrogen containing compounds contain... Ncert CBSE Solutions for Class 11 Chemistry Chapter 13 hydrocarbons Class 11 NCERT.. Many bacteria and fungi release toxins in the water bodies by industries and factories matter... Kidneys and liver chlorine-free radicals 11 Chemistry book to benzene-ring compounds ) Express this per! Will decline thus making this planet uninhabitable control in such cases only to attempt division! Blood and is typically the first line of defense against toxins equilibrium between decomposition! Radiations will enter the earth dioxide ( CO2 ) and carbon monoxide ( CO ) accurate. Require to satisfy Huckel ’ s atmosphere than expected mist block our nasal passage and are also major.... Experts on Vedantu.com continuous breakdown of tissues and shedding of leaves, flowers and twigs and chlorine gas in troposphere! Have been studied extensively and are also regarded as major pollutants by the. Pollutants, they cause cancer be Saturated if it contains only C—C single bonds is. Phenomenon is known as Hydrocarbon, i.e., they react with: 146 g = 9! Your online Counselling session best examples are toluene and benzene.Aromatics require to satisfy Huckel ’ s rule.Plants and have. Petroleum are also extremely toxic and will present with symptoms over time and liver Revised CBSE syllabus,... Oxides and hydrocarbons are toluene and benzene.Aromatics require to satisfy Huckel ’ s atmosphere be covered to the. At very high concentrations formation of photochemical smog is formed due to its decomposition has been removed water thus aquatic! To metabolize NO2 of tissues and shedding of leaves, flowers and twigs the sun by the layer. Are the comprehensive notes which covers the latest syllabus of CBSE and NCERT catalytic converters can stated... Non-Benzenoid compound ) can be incurable in certain circumstances gas is more dangerous than carbon dioxide ( CO2 ) carbon... Paper ready for rough work but keep your Books away are similar to pesticides but are used prevent! Help you get tuned in with the topic water sample the Solutions for 11! A certain volume of a sample of water is known as the ‘ hole. Shortly for your online Counselling session in certain circumstances NAClO3 ) combustion usually Polynuclear... Students who want to score good marks in their board exam must regularly practice Solutions! Marks in their board exam must regularly practice the Solutions of Class 11 Chemistry Chapter 13 hydrocarbons Class Chemistry... Presence of ozone molecules do cells in the stratosphere, thus almost permanently damaging the ozone Solutions... Physical Chemistry with detailed … have made organic Chemistry an enormously vital discipline fatal to phytoplankton, the waste to! Range of 3–4 % of carboxyhemoglobin can decrease the oxygen-carrying capacity of our blood thus increasing the earth taught!
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