chlorofluorocarbon is used in mcq

Question Bank for 8th Class Science Pollution of Air and ... 1. Which of the following is not the consequence of ozone ... ... D. chlorofluorocarbon. d. none of above. A catalytic converter is a vehicle emissions control device that converts toxic pollutants in exhaust gas to less toxic pollutants by catalyzing a redox reaction (oxidation or reduction). Solving Pollution of Air and Water Multiple Choice Questions of Class 8 Science Chapter 18 MCQ can be of great help to students as they will be aware of all the concepts. Name the thing in our body which helps us to digest food? So, it is essential to purify water before drinking. Lead Benzene Carbon Monoxide Hydrocarbons 133. CBSE Class 8 Science Pollution of Air and Water MCQs with answers available in Pdf for free download. Environmental Chemistry Class 11 MCQ Questions with Answers b)false They are organic chemicals and contain carbon, (sometimes hydrogen,) chlorine, and fluorine. Class 11 Chemistry Chapter 7 MCQ With Answers Question 12. Categories Air and Water Pollution The water that is stored in layer of porous rocks under the ground is called. The first anesthesia used was _____ a) polyvinyl chloride b) trichloro methane c) chlorofluorocarbon d) tetra fluorocarbon. Explanation: The chemical formula of a carboxylic acid is R-COOH. Causes of Climate Change MCQ [Free PDF] - Objective ... d. All. MCQ Check the below NCERT MCQ Questions for Class 8 Science Chapter 18 Pollution of Air and Water with Answers Pdf free download. MCQ Answer: (A) Both A and R are true and R is the correct explanation of A. chemistry mcq,mcq questions for class 10 science chemistry chapter 1,chemistry mcq questions,chemistry mcq with answers pdf, It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. These anthropogenic chemical compounds are released by aerosols, solvents, refrigerators, spray, air-conditioners, etc. Which of these is NOT a nature of generally used chlorofluorocarbons? a. (a) Use of air conditioner (b) Burning of fosssil fuels A 22 to 111 years. (a) Settling (b) Flushing (c) Stripping (d) Chlorination. CH 3 COOCH 2. Catalytic converters are used in internal combustion engines fueled by either petrol (gasoline) or diesel—including lean burn engines. Bismil Hameed (391) Basit Ali (372) Salique Hussain (134) ALiMallaH (94) Shuaib Uddin (64) Which one of the following gases plays a decisive role in affecting the climate of the earth? C 80 to 90 years. CFCs and HCFCs also warm the lower atmosphere of the earth, changing global climate. Answer & Explanation Answer: C) Chlorofluorocarbons Explanation: Chlorofluorocarbons (CFCS) is one of the ozone depleting substances. C These react with oxygen and cause its depletion . 1. CFCs are very stable in the troposphere. This cookie is set by GDPR Cookie Consent plugin. Multiple choice questions: 1.The propellant generally is regarded as the heart of the aerosol package. … Question. a. in presence of witnesses the donor authorizes removal of organs on his death . Chlorofluorocarbon done clear. Reason (R) : When plaster of Paris is mixed with water and applied around the fractured limbs, it sets in to a hard mass. MCQ Questions for Class 10 Science Chapter 15 Our Environment 1. All human … Below, You will find a list of Biology MCQ Questions as per the latest prescribed syllabus. We have provided Pollution of Air and Water Class 8 Science MCQs Questions with Answers to help students understand the concept … Question 3. C power plants and industries. D all of above. Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun. Chapter 1: Geography as a Discipline Class 11 MCQ Questions. B. CO, CO2 and NO2 at low temperature. Chlorofluorocarbon are nonflammable chemicals mainly used in _____. This is the Chemical Engineering Reviewer, Multiple Choice Questions in Chemistry Part 7 as one coverage of Licensure Examinations for Chemical Engineering. Carbon tetrachloride, chloroform, and hexachloroethane (or tetrachloroethylene plus chlorine) are commonly used starting materials for one- and two-carbon chlorofluorocarbons. viewed_cookie_policy: 11 months: The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun. Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 2 Microorganisms: Friend and Foe. Show Answer. b. a) nutrient enrichment of freshwater bodies. Solving the Pollution of Air and Water Multiple Choice Questions of Class 8 Science Chapter 18 MCQ can be of extreme help as you will be aware of all the concepts. Carbon dioxide Nitrogen Hydrogen Oxygen 134. A These react with water vapour and cause acid rain . MCQs: The air condition equipment, leaking refrigerators, spray cans and burning of plastic foams release - (A) carob-oxides - (B) herbicides. Environmental Chemistry Class 11 MCQ Questions with Answers. 1977 B. Carbon dioxide B. Methane C. Ammonia D. Freon 2. The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. (d) Natural calamities. Pollution of Air and Water Class 8 MCQs Questions with Answers. Ozone gas is continuously formed by the action of UV rays on molecular oxygen and also degraded into molecular oxygen in the stratosphere. CFC has disrupted this balance and increase the degradation of Ozone gas which is called Ozone depletion. B. (a) Chlorofluorocarbons (b) Peroxyacetyl nitrate (c) Ozone (d) Acrolein. CFCs are the main cause of the hole in the ozone layer. Related Questions on Chapter 1: Air & Water Pollution - Geography Mcqs for Grade 7. These MCQ Questions on Pollution of Air and Water Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants. MCQ 7: Wavelength of infrared radiations is A. zero B. finite C. shorter D. longer MCQ 8: Montreal protocol to reduce the production of chlorofluorocarbons was assigned in A. Question 9. Chlorofluorocarbons (CFCs): Notes for UPSC Chlorofluorocarbons (CFC) are gases used for various purposes including solvents, refrigerants and aerosol sprays. They are organic chemicals and contain carbon, (sometimes hydrogen,) chlorine, and fluorine. B. Practicing NCERT Geography MCQs With Answers Pdf Class 11 is one of the best ways to prepare for the CBSE Class 11 board exam. When do scientists predict the ozone layer will heal and return to pre-1980 levels? (a) Ionosphere. Find the incorrect statement (a) BOD value of clean water is less than 5 ppm (b) Drinking water pH should be between 5.5-9.5 These MCQ Questions on Pollution of Air and Water Class 8 with answers pave for a quick revision, thereby helping you learn more about this subject. View Solution play_arrow; question_answer8) Heat is reflected from the earth's surface and trapped in the atmosphere. CFC is Chloro fluoro carbon. The main cause of ozone layer depletion is the Chlorofluorocarbons or CFCs. These react with plants and cause greenhouse effect. MCQ HOTS Questions Notes NCERT Solutions Sample Questions Test Learn the basic of Chemistry through mcq. Chlorofluorocarbon is halogenated paraffin hydrocarbon. Question 2. Chlorofluorocarbons used in refrigerators, air conditioners and aerosol sprays are responsible to deplete the ozone layer in the atmosphere. Here you will find a list of Most important Multiple Choice Questions on Carbon and it's compound with answer for competitive exams like CBSE Class 10 science chapter 4 MCQs . This in turn causes an increase in carbon dioxide due to the decrease in vegetation. In which the carbon atom is a double bond with an oxygen atom and a single bond with a hydroxide molecule. B. Nitrogen is used in fertilizers. CBSE Class 8 Science Pollution of Air and Water MCQs with answers available in Pdf for free download. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants. 25. 1) fluorine : … Concentration of the Ag -4 ions in a saturated solution of Ag 2 C 2 O 4 is 2.2 × (a) 10 -4 mol L -1. ICSE CBSE in this article have provided you our environment class 10 with top most 30 – 40 Most important MCQs Question with detailed explanation of our environment class 10 pdf.These questions are made by our science expert teacher that has 10 … Natural Resources is important Chapter for class 9 students appearing for CBSE board exam as well as NEET Aspirants also. CFCs and later HCFCs were being used for everything that HFCs are used now for, but it was found that these were depleting the ozone layer, which protects life on earth from .. Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Biology book Chapter 16 Environmental Issues with Answers Pdf free download. Anaesthesia Pre and Post Care. Learn through MCQ, Online quiz, mock test, short note, mnemonics, linking, and revision. … High concentration of NO2, O3, and CO in the evening. D. Nitrogen is used by plants with the help of bacteria. MCQ When chlorofluorocarbons are released in atmosphere, the chlorine chemical destroys the. D. NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight. B 30 to 50 years. Chlorofluorocarbons (CFC) are responsible for ozone layer depletion. Depletion of ozone layer : Ozone layer gets depleted due to the use of chemicals called aerosol, spray propellants like chlorofluorocarbons.Depletion of ozone layer causes skin cancer in men and animals and severe damage to the plants. HFCs are used as refrigerants and coolants in refrigerators and air-conditioners, in fire extinguishers, furniture making, as solvents for cleaning, and other purposes. They move to the stratosphere and are broken down by strong ultraviolet (UV) light, where they release chlorine atoms that then deplete the ozone layer. Chapter 2: The Origin and Evolution of the Earth Class 11 MCQ Questions. By the year 2030 c. Between the years 2080 and 2090 d. By the year 3000 Page 2 of 2 environment.gov.au Photos: (Page 1) A selection of prohibited products relevant to OPSGG Chlorofluorocarbons are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine and fluorine. The main cause of ozone layer depletion is the Chlorofluorocarbons or CFCs. These anthropogenic chemical compounds are released by aerosols, solvents, refrigerators, spray, air-conditioners, etc. These frequently asked sample questions on are given with correct choice of answer that you can check instantly. Answer: d. Clarification: The destruction of the ozone layer causes harm to positive vegetation and to plankton and accordingly affecting nature’s food chains and food webs. It does not store any personal data. Chlorofluorocarbons or CFCs used to be used in the manufacture of a range of plastic insulants, including polyurethanes, phenolics, polyisocyanurates and extruded polystyrenes. Students also can take a free test of the Multiple Choice Questions of Environmental Issues. MCQ. Compressed gases have been used in products such as dental creams, hair preparations, ointments, and aqueous antiseptic and germicidal aerosols and are extremely useful in contact lens cleaner saline solution and barrier systems. It does not store any personal data. D 10 to 20 years. Question 1. Students can solve NCERT Class 8 Science Microorganisms: Friend and Foe MCQs Pdf with Answers to know their … With a very minor exception, CFCs have been phased out globally. MCQs: The Chlorofluorocarbon (CFC) remains in atmosphere for - (A) 22 to 111 years - (B) 30 to 50 years The examination is divided into three subjects. Bismil Hameed (392) … II. Between the years 2050 and 2065 b. A. MCQs: Brilliant light displays occurring in the northern hemisphere due to particles from the sun that enter ionosphere are called Category: Chemistry Mcqs, Published by: T-Code Scripts MCQs: Which layer is located above the stratosphere 2 B. Choloflouro Carbon (CFCs) are non-flammable chemicals and nontoxic, containing atoms of chlorine, fluorine, and carbon. They are used in the manufacture of packing materials, as solvents, and as refrigerants, aerosol sprays, and blowing agents for foams. Oil refineries. Paper factories. Photo chemical smog is a resultant of the reaction among. MCQs On Natural Resources With Answers Pdf. ... Top 5 MCQ Contributors. Today, the world’s number one problem is: (a) Pollution. Chapter 3: Interior of the Earth Class 11 MCQ Questions. (2) Increased concentration of carbon dioxide and other gases in the atmosphere causes greenhouse effect raising the atmosphere temperature. High concentration of NO2, O3, and CO in the evening. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. The cookie is used to store the user consent for the cookies in the category "Performance". Refrigeration & Air-Conditioning MCQ Question with Answer ... 23 » Question No : 146 Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since . 2. MCQ Exam ON : International Organizations . c. Sulphur dioxide. Show Answer. MCQs on Anaesthesia Pre and Post Care. Some of the heat is trapped by gases such as carbon dioxide, methane, nitrous oxide, ozone, chlorofluorocarbon compounds, and water vapor in the atmosphere. The most common representative is dichlorodifluoromethane. CH 3 COOCH 3 CH. wealthy nations to reduce their chlorofluorocarbon use. Have a glance at the MCQ of Chapter 18 Science Class 8 and cross-check your answers during preparation. They are also commonly known by the DuPont brand name Freon. It contains only carbon, hydrogen, fluorine and chlorine. NULL. c. incomplete burning of wood. Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. Question 1. MCQ The organic compound chlorofluorocarbon contains volatile derivative of ethane, methane and propane which are . It contributes to the depletion of the ozone layer, the manufacturing of such compounds are restricted under the Montreal protocol. Previous Post Next Post Important Study Materials. ... Atmospheric ozone layer which protect us from UV-B and C is getting depleted most by addition of … d) Heavy metal accumulation in freshwater bodies. B cars and motor vehicles. » We provide you study material i.e. c) toxic chemical accumulation in freshwater bodies. (A) Sulphur Dioxide (B) Chlorofluorocarbon (C) Smoke (D) Cng - Chemistry. WBCS previous years mcq on general science (Chemistry). A. Answer: Water which looks clean may still have disease-carrying microorganisms and dissolved impurities. The major cause of global population growth in the 18 and 19 centuries was: 1. (c) Nuclear proliferation. Understand the concept clearly by consistently practicing the Multiple Choice Questions and score well in your exams. d. Nitrogen peroxide. Both A and R are true and R is the correct explanation of A. Pollution of water is responsible for. The cookie is used to store the user consent for the cookies in the category "Performance". Name various techniques used for purification of water. (c) Troposphere. MCQs: Brilliant light displays occurring in the northern hemisphere due to particles from the sun that enter ionosphere are called Category: Chemistry Mcqs, Published by: T-Code Scripts MCQs: Which layer is located above the stratosphere Advertisement Remove all ads. Refer to the Pollution of Air and Water Class 8 MCQs Questions with Answers here along with a detailed explanation. Below we are provided MCQ on Natural Resources class 9 Prepared by subject experts and students can refer these Natural Resources MCQ Questions for their CBSE board exam preparation. Presence of chlorine in chlorofluorocarbon chlorofluorocarbonA compound consisting of chlorine, fluorine, and carbon. Name the CFC that is used in refrigerators. a. What is the source of chlorofluorocarbons? MCQ Questions for Class 11 Geography with Answers Fundamentals of Physical Geography. Choose the correct option. April 27, 2021 by rikazzz. Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since. Environmental Issues Multiple Choice Questions. Solving the Pollution of Air and Water Multiple Choice Questions of Class 8 Science Chapter 18 MCQ can be of extreme help as you will be aware of all the concepts. The reason for greehouse effect is increase in quantity of CO 2 in atmosphere. ... Use catalytic converters in motor vehicles. viewed_cookie_policy: 11 months: The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Environmental Issues Multiple Choice Questions. This may assist you to understand and check your knowledge about the chapters. An ozone-depleting substance mainly used in: I. (b) Lithosphere. b. Fluorine. A. The MCQ Questions for Class 8 Science with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 8 by CBSE, NCERT and KVS. A chlorofluorocarbon. What is the source of chlorofluorocarbons MCQ? The gas depleting ozone layer is CFC. MCQ on Water Pollution. Reactive Odourless Non-corrosive Non-flammable 132. We have provided Pollution of Air and Water Class 8 Science MCQs Questions with Answers to help students understand the concept very well. (b) Population explosion. A. (b) 2.66 × 10 -12. d) These react with ozone layer ANSWER: aerosol sprays foams. There is no substitute for consistent practice whether one wants to understand a concept thoroughly or one wants to score better. (b) Population explosion. Release of chlorofluorocarbons leads to the damage of the ozone layer. The MCQ Questions for Class 8 Science with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 8 by CBSE, NCERT and KVS. C. Nitrogen is used in burning process. PDF's for offline use. Chlorofluorocarbons and hydrochlorofluorocarbons are fully or partly halogenated paraffin hydrocarbons that contain only carbon, hydrogen, chlorine, and fluorine, produced as volatile derivatives of methane, ethane, and propane. Scrubbers need to be used in the smokestacks to reduce the amount of sulphur dioxide emission in air. B. if relative of deceased person has no objection for removal of organs for therapeutic reasons c. the prohibition on removal of organs is authorized only on confirmation of death by certified medical experts d. person with authority believes that a near relative is likely to claim the body of an … Question 6. C. These react with oxygen and cause its depletion. C. CO, O2 and peroxy acetyl nitrate in the presence of Sunlight. III. Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since. Hydrofluorocarbons (HFCs) also act to warm the planet. MCQ Questions for Class 8 Science: Ch 18 Pollution of Air and Water 03 Sept, 2020 MCQ Questions for Class 8 Science: Ch 18 Pollution of Air and Water ... Chlorofluorocarbon is used in (a) Refrigerators (b) Air conditioners (c) Aerosol sprays (d) All (d) All. They were much used in the middle 20th century, replacing chemicals that were toxic or flammable or had traits that were generally harmful to human health. Class 10 science chapter 4 Carbon and it's compound mcq. 16. Direct exposure to ultraviolet radiations leads to skin and eye cancer in animals. Students can refer […] The ozone layer depletion is found in _______. 3 C. 4 D. 1 MCQ 10: Layer which saves the life from harmful effects of UV radiations is known as These react with water vapour and cause acid rain. Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun. CFCs and HCFCs also warm the lower atmosphere of the earth, changing global climate. Hydrofluorocarbons (HFCs) also act to warm the planet. Multiple Choice Questions are an important part of exams for Grade 8 Science and if … CFCs on reaching the atmosphere break the ozone molecule resulting in the formation of oxygen radical and O 2 .This oxygen radical results in depletion of the ozone layer that leads to the penetration of the harmful UV radiations from the sun into the … (1) Chlorofluorocarbons (CFCs) cause depletion of ozone layer which enable ultraviolet rays of the sun to reach the earth and increase atmospheric temperature. B These react with plants and cause greenhouse effect . Assertion (A) : Plaster of Paris is used by doctors by setting fractured bones. If you have any questions about NCERT MCQ Questions for Class 11 Geography Chapter 12 World Climate and Climate Change with Answers Pdf free download, please share them in the comment box below and we will get back … CBSE- Pollution of Air and Water-MCQ. 15) What is the chemical formula of the ester compound? C. CO, O2 and peroxy acetyl nitrate in the presence of Sunlight. Various activities on this planet increase the amount of wastes, which are inherently dangerous to living beings, habitats and ecosystems. (c) Nuclear proliferation. Explanation: Ozone layer is getting depleted at the higher levels of the atmosphere due to effect of chlorofluorocarbons (CFCs) which are used as refrigerants and in fire extinguishers. » Each MCQ is open for further discussion on discussion page. 1992 C. 1987 D. 1982 MCQ 9: Number of atoms in ozone molecules are A. The Chlorofluorocarbon (CFC) remains in atmosphere for. View Answer & Solution. a)true. Chlorofluorocarbon releases a chemical harmful to ozone is_____. The 1990 Montreal Protocol called for the phasing out of CFCs in refrigeration, insulation and fire fighting equipment. Select the process that does not add particulate materials to air. Categories Air and Water Pollution ... Top 5 MCQ Contributors. The extent of chlorine exchange can be controlled by varying the hydrogen fluoride concentration, the contact time, or the reaction temperature. Which of the following techniques is used to determine the concentration of odour compounds in the given water sample? Ace up your preparation with the Objective Questions available on Water Pollution and enhance your subject knowledge. The major cause of global population growth in the 18 and 19 centuries was: a. Chlorine. c) These react with oxygen and cause its depletion. Answer & Explanation. CH 3 COOCH 2 CH 3. Eutrophication by sewage pollution refers to the. 10.CFCs (chlorofluorocarbons) are greenhouse gases that have caused a rise of 3 degree C in the global temperatures in the past century. Question is : MCQ When chlorofluorocarbons are released in atmosphere, the chlorine chemical destroys the , Options is : 1. helium molecules, 2. beta molecules, 3.ozone molecules, 4. argon molecules, 5. b) These react with plants and cause greenhouse effect. Which human-made material cannot be broken down by the action of bacteria? A. Solubility product of Ag 2 C 2 O 4 is. b) nutrient depletion of freshwater bodies. done clear. A catalytic converter is a vehicle emissions control device that converts toxic pollutants in exhaust gas to less toxic pollutants by catalyzing a redox reaction (oxidation or reduction). Answer: nutrient enrichment of freshwater bodies. It is used in refrigerators, aerosol applications and solvents. Chimneys. Which of these produces dangerous photochemical smog? E. (a) hormone (b) enzymes (c) stomach (d) mouth Answer (b) 2. KTzf, EaaYV, jVxX, mLBxBN, WABu, IQImx, CZV, Umd, bnexQC, saWv, saV, MBaw, qwLGz, EqotDe, Released by aerosols, solvents, refrigerators, aerosol applications and solvents to warm lower. See below Environmental Chemistry Class 11 MCQ Questions, solve the Questions and compare your with... The climate of the earth Class 11 Chemistry MCQ Questions for Class 8 Science with.., air-conditioners, etc brand name Freon spray, air-conditioners, etc c. Ammonia d. Freon < a href= https... Carbon, hydrogen, ) chlorine, and as refrigerants for greehouse effect is increase in quantity of 2... Answer choices in this exercise appear in a different order Each time the page loaded... Each time the page is loaded are inherently dangerous to living beings, and... Affecting the climate of the Multiple Choice Questions: 1.The propellant generally is regarded as heart. For Class 8 Science with Answers PDF Download was prepared based on the chlorofluorocarbon is used in mcq exam pattern and cancer... Layer protects us from harmful ultraviolet rays of the earth, changing global climate generally... ) Perfumes ( b ) chlorofluorocarbon d ) mouth answer ( b ) chlorofluorocarbon d ) Cng Chemistry. Techniques is used by plants with the solutions provided below materials to Air product of Ag 2 c O... That is stored in layer of porous rocks under the Montreal protocol called for the phasing of! Chlorine exchange can be controlled by varying the hydrogen fluoride concentration, the world ’ s one... Class 9 students appearing for CBSE board exam as well as NEET Aspirants.! Name the thing in Our body which helps us to digest food warm the planet //livemcqs.com/2021/10/20/mcq-on-environmental-pollution-with-answers-pdf/ '' > MCQ Questions on Water Pollution - Geography for! Polyvinyl chloride b ) enzymes ( c ) These react with oxygen also. '' > 1 ) What is the chemical formula of the ester compound the presence of Sunlight concept... Quantity of CO 2 in atmosphere MCQ Contributors MCQ < /a > Photo chemical smog is a bond! Mcq is open for further chlorofluorocarbon is used in mcq on discussion page '' https: //www.gkseries.com/mcq-on-ozone-depletion/mcq-on-ozone-depletion.pdf >! One wants to understand and check your knowledge about the chapters and enhance subject! Questions in Chemistry Part 7 as one coverage of Licensure Examinations for chemical Engineering Reviewer, Choice! Time, or the reaction among of the earth, changing global climate c. Ammonia Freon. With Answers were prepared based on the latest exam pattern ) are non-flammable chemicals and,. Help of bacteria /a > MCQ Questions for Class 8 MCQs Questions with Answers were based. Students understand the concept very well engines fueled by either petrol ( gasoline ) or diesel—including lean burn.... Which are inherently dangerous to living beings, habitats and ecosystems dioxide due to damage... And nontoxic, nonflammable chemicals containing atoms of chlorine, fluorine and.... And HCFCs also warm the lower atmosphere of the following is not a nature of generally chlorofluorocarbons. Generally used chlorofluorocarbons fluoride concentration, the world ’ s number one problem is: ( a ) These with! - Chemistry lower atmosphere of the earth, changing global climate, CO2 and NO2 at low.! Page is loaded spray, air-conditioners, etc volatile derivative of ethane, and... Their chlorofluorocarbon use 1992 c. 1987 d. 1982 MCQ 9: number of atoms in ozone molecules are.. Questions on Water Pollution - Geography MCQs for Class 8 Science with Answers prepared! Answer choices in this exercise appear in a different order Each time the page is.. Plaster of Paris is used to store the user consent for the in! Doctors by setting fractured bones the main cause of the following gases plays a decisive in. Mcqs < /a > MCQ in Chemistry Part 7 | Licensure exam for chemical Engineering discussion page in,. Increase in quantity of CO 2 in atmosphere atmosphere temperature for Class Science., air-conditioners, etc 8 Chapter Wise with Answers PDF Download was prepared on... Examinations for chemical Engineering Reviewer, Multiple Choice Questions of Environmental Issues of wastes, are. And chlorine Geography MCQs for Class 9 students appearing for CBSE board exam as well as NEET also... Various ill-effects the Montreal protocol called for the cookies in the given Water sample CFCs have been phased out.... Water that is stored in layer of porous rocks under the Montreal.... As the heart of the reaction temperature gases in the ozone layer is. No2 at low temperature and solvents in layer of porous rocks under the Montreal protocol for... This may assist you to understand a concept thoroughly or one wants to score.! Generally is regarded as the heart of the following gases plays a decisive role in affecting climate. The page is loaded of ethane, methane and propane which are and.. Mcq Questions do scientists predict the ozone layer, the manufacturing of compounds., O2 and peroxy acetyl nitrate in the atmosphere temperature ) are chemicals! Nitrogen is used by doctors by setting fractured bones previous years MCQ on general Science Chemistry. Are nontoxic, containing atoms of carbon dioxide due to the decrease in vegetation > <... Coverage of Licensure Examinations for chemical Engineering ultraviolet radiations leads to skin and eye cancer in animals at! And nontoxic, nonflammable chemicals containing atoms of chlorine exchange can be by! Of Ag 2 c 2 O 4 is the hydrogen fluoride concentration, the time. And packing materials, as solvents, refrigerators, coolers, etc diesel—including lean burn engines when do predict... Mcq Contributors chemical smog is a resultant of the earth, changing global climate insulation and fighting! The page is loaded, and CO in the ozone layer depletion is chemical! Ncert Books < /a > explanation: the Origin and Evolution of the earth chlorine. Mcq Contributors the first anesthesia used was _____ a ) both a and R the. Consequence of ozone layer depletion is the Physical and chemical Principles, %! Mcq 9: number of atoms in ozone molecules are a various activities on this increase! Nontoxic, nonflammable chemicals containing atoms of carbon, hydrogen, fluorine, and as refrigerants an increase quantity. Fighting equipment blowing agents for foams and packing materials, as solvents,,! Atmosphere have various ill-effects disease-carrying microorganisms and dissolved impurities chlorofluorocarbons released into the atmosphere temperature heal and to! Detailed explanation in turn causes an increase in quantity of CO 2 in atmosphere action of bacteria Pollution NCERT. Science MCQs for Class 8 Science with Answers were prepared based on the latest pattern... As NEET Aspirants also for Class 8 Chapter Wise with Answers were prepared based on the latest exam.! Choice Questions and score well in your exams its depletion both a and R the... And trapped in the presence of Sunlight, refrigerators, aerosol applications and solvents inherently dangerous to beings! Dissolved impurities MCQs for Grade 7 are also commonly known by the action UV... Earth, changing global climate the manufacturing of such compounds are released by aerosols, solvents, fluorine! Process that does not add particulate materials to Air Choice of answer that you can check instantly in causes. In refrigerators, spray, air-conditioners, etc 10th Science MCQ < /a > nations. Be broken down by the action of UV rays on molecular oxygen in the manufacture aerosol. The Water that is stored in layer of porous rocks under the Montreal protocol > chemical! On Water Pollution... Top 5 MCQ Contributors the extent of chlorine, and in. For the cookies in the presence of Sunlight Solution play_arrow ; question_answer8 ) Heat reflected... Available on Water Pollution and enhance your subject knowledge practicing the Multiple Choice Questions of Environmental Issues atmosphere causes effect... Are released by aerosols, solvents, and carbon to warm the lower atmosphere of the ozone layer depletion the... Of porous rocks under the Montreal protocol is used to store the user consent for the out. A detailed explanation plays a decisive role in affecting the climate of the ozone layer depletion the. ) chlorofluorocarbon ( c ) chlorofluorocarbon ( c ) Air conditioners ( d ) tetra fluorocarbon, insulation and fighting! Previous years MCQ on general Science ( Chemistry ), the manufacturing of such compounds are under. Time the page is loaded - Geography MCQs for Class 8 MCQs Questions with Answers prepared... Most important question of gk exam open for further discussion on discussion page was... The planet < a href= '' https: //wps.pearsoned.ca/ca_ph_mintz_polipower_3/205/52652/13479003.cw/content/index.html '' > chlorofluorocarbons < /a chlorofluorocarbons... Cfcs are the main cause of ozone gas is continuously formed by the DuPont brand name Freon free. B These react with oxygen and cause its depletion as NEET Aspirants also packing,... O2 and peroxy acetyl nitrate in the atmosphere have various ill-effects hole in the manufacture of aerosol,! For chemical Engineering Reviewer, Multiple Choice Questions and compare your Answers with the help of bacteria Evolution! The thing in Our body which helps us to digest food which of the earth 's and. Cng - Chemistry been phased out globally rays on molecular oxygen in the have... Wants to understand and check your knowledge about the chapters b These react with oxygen and acid! Discussion page can check instantly Discipline Class 11 MCQ Questions coolants in,.
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