L-6 MCQ (A) MCQs of the Textual Exercise 1) In haloalkane _________ bond is formed between carbon and halogen. (a) Ionic (b) van der Waals (c) Covalent (d) hydrogen 2) In haloarene compounds‚ halogen combines with carbon having which hybridization? (a) sp2 (b) sp3 (c) sp (d)dsp2 3) In haloalkane‚ carbon in C-X bond possesses which partial electric charge? (a) Charge less (b) positive (c) negative (d) anionic 4) Which of the following bonds is the strongest?
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herbicides are an example of dangerous synthetic chemicals used around the world. Chemical pesticides are synthetic chemicals used to kill and prevent pests from impeding agriculture. For example‚ toxaphene is a synthetic organic insecticide made by the chlorination of camphene‚ a toxic fuel known for almost being insoluble in water (http://www.epa.gov). Toxaphene contains over 670 chemicals and does not occur naturally (http://www.aadnc-aandc.gc.ca). Improper irrigation or bad weather can cause pesticide
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Although vaccination has proved to be an effective measure in preventing disease‚ controversies remain over whether the risks of side effects of vaccinations outweigh the risk of contracting the disease. Vaccination is the process when pathogenic cells are injected into the cells of a healthy person so that the body develops immunity through antibodies to that virus or bacterium. The U.S Center for Disease Control and Prevention recommends that children get 16 vaccines including Diphtheria‚ hepatitis
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004:121 Organic I Fall 2010 Final Exam Please read each question carefully before answering. Answer the questions in ink in the spaces provided inside. If you make changes as you go‚ please make sure your final answer is clearly indicated. Scratch papers are available at the end. Total points = 150. You have 120 min. Good Luck! ____________________________________________________________ ___________ Grading: Q.# 1. 2. 3. 4. 5. 6. 7. Score (Max) __________ (60 pts) __________ (18
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Sewage treatment The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment and prevent pollution.[1] Sewage treatment‚ or domestic wastewater treatment‚ is the process of removing contaminants from wastewater and household sewage‚ both runoff (effluents) and domestic. It includes physical‚ chemical‚ and biological processes to remove physical‚ chemical and biological contaminants. Its objective is to produce an environmentally-safe
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as a radical (a species with a single unpaired electron). These reactions involve a single-electron push – see W (2) Ch 37 on Radical reactions: Examples – the SET reaction in the Grignard practical as well as the classical free-radical chlorination of a hydrocarbon like cyclohexane‚ which typically illustrates the free-radical mechanism (see side-chain functionalisation in Aromatic notes with NBS)‚ in which there are initiation‚ propagation and termination steps: (iii) Pericyclic –
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CHAPTER 1 WATER AND THE BLUE PLANET 1.1 Introduction Of “The Blue Planet” (The Earth) 71% of the earth is covered by water. 29% of the surface is covered by land. It is the only known planet with life. Fig1.1 the blue planet The earth is known as “Blue Planet” occupies a special place in the solar system. The earth consists of three spheres. They are known as Atmosphere‚ the Hydrosphere and the Lithosphere. The interrelationship that exists among these three spheres is the foundation
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Reactions of pyridine Introduction: 1. Pyridine structure: 2. Iupac name: Pyridine‚ other name: Azine & Azabenzene. *Important commercial alkyl pyridinium compound is α - methyl- pyridine (2)‚ βpicoline (3)‚ γ- picoline ( 4 ) ‚ 2‚6 - lutidine ( 5 ) ‚ 3‚5 - dimethyl- pyridine ( 6 ) ethyl-2 - methyl- pyridine ( 7 ) and 2‚4‚6 - collidine ( 8 ) . In general‚ the alkyl -substituted pyridine as many other precursors used in pyridine E-commerce. From these further alkyl substituted pyridine
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since it does not contain chlorine‚ and may contain a mix of minerals to enhance flavor‚ may taste better than untreated tap water. Most bottled water will contain fewer contaminants than untreated tap water. DISINFECTION METHODS : Chlorination 1. Contact time reqired is 30-50 minutes. So cannot be used in online system. 2. Residual chlorine may give rise to trihalomethanes. Which are carcinogenic and may affect liver and kidneys. 3. May give rise to a bad smell and odour
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349kb] Fact sheet 1.13: Coagulation‚ flocculation and clarification [pdf 205kb] Fact sheet 2.14: Rapid sand filtration [pdf 187kb] Fact sheet 1.15: Storage tanks [pdf 142kb] Fact sheet 2.16: Disinfectants [pdf 262kb] Fact sheet 2.17: Chlorination concepts [pdf 260kb] Fact sheet 2.18: Chlorine gas or liquid in cylinders [pdf
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