MAXIMUM MARK: 40 SYLLABUS/COMPONENT: 0620/01 CHEMISTRY (Multiple Choice) Page 1 Mark Scheme IGCSE EXAMINATIONS – June 2003 Syllabus 0620 Question Number Key Question Number Key 1 2 3 4 5 C B A D A 21 22 23 24 25 B D A B D 6 7 8 9 10 C A A B C 26 27 28 29 30 B D D D B 11 12 13 14 15 B D C D B 31 32 33 34 35 D D A A B 16 17 18 19 20 C A C A C 36 37 38 39 40 A A B
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Kwok Tak Seng Catholic Secondary School S.6 Chemistry Experiment [9] – To Determine the Activation Energy of the Reaction between Br— and BrO3— in Acid Solution S.6 ( ) Name: [ ] ( ) Time allowed: 55 minutes Introduction: The reaction can be represented by 5Br—(aq) + BrO3—(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(l) The progress of the reaction may be followed by adding a fixed amount of phenol together with some methyl red indicator. The
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MANUFACTURE OF ACRYLIC ACID BY PARTIAL OXIDATION OF PROPYLENE Submitted by‚ P.V.R.Krishna Prasad. M.Prem Kumar. ACKNOWLEDGEMENT We hereby place our sincere thanks to Dr.R.KARTHIKEYAN‚ Head of the Department of Chemical Engineering ‚ Faculty of Engineering and Technology‚ S.R.M University and the faculty members of Chemical Engineering Department for their full hearted co-operation and encouragement for the completion of this project. We extend our thanks to our Project guide Mr
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Tutorial 5 Suggested answers of the tutorial questions EXERCISE 15.31 Customer response time 1 Date March April Days taken Action 10 LO’s order received by sales department 0 0 14 Order forwarded to manufacturing department 4 4 28 Fabric received from supplier 14 18 8 26 5 Manufacturing commenced 16 Manufacturing completed and order sent to warehouse 30 Order delivered to customer 11 14 Total customer response time 2 3 Cumulative days Order receipt time (days) Waiting
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Entries for Chapter 5&6 Quote 1: “ Here‚ she said to herself‚ had been the scene of her guilt‚ and here should be the scene of her earthy punishment; perchance‚ the torture of her daily shame would at length purge her soul and work out another purity than that which she had lost; more saintlike‚ because the result of martyrdom” (Hawthorne 80). Hester choose to stay in Boston when she is able to choose to leave. She states that because she thinks this is the place that she commits her sin‚ also
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For instance‚ chapter 5 was about the inequality when it comes to wealth distribution. However‚ chapter 6 goes a little deep by mentioning it does not matter about your status because God will embrace you either way. In addition‚ it’s more directed at the household and what each member of that household should do to make sure they are thriving. I would say that they both focus on economic; however‚ both chapter seems to define them differently. For me‚ I felt that chapter 5 argument was based on
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A neutralization reaction of ethanoic acid and sodium hydrogen carbonate Cristina Li 17th April 2017 Introduction The hypothesis is the balloon will be bigger and bigger with the increase of vinegar. The chemical reaction between the baking soda and vinegar produces bubbles of carbon dioxide gas as part of this acid-base reaction. Sodium hydrogen carbonate (baking
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Week 5/6 iLab Report SriLakshmi Avireneni DeVry University MIS589: Networking Concepts and Applications MIXED 11B/11G WLAN PERFORMANCE Submitted to: David Apaw Professor: Name of your professor Date: 4/12/2015 Mixed 11b/11g WLAN Performance 1. In your opinion‚ what is the purpose of our dropping the transmit power to such a low level? I believe having 1 node or just a few nodes would be accessing this access point. With dropping the power output will help increase stability if there
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Carter Cleaning Chapter 5 and 6 Chapter 5 1. * Conduct exit interviews to employees leaving to see why they are leaving and what they believe the company can do to improve. * Hire more qualified employees. For example make it mandatory to have a high school degree for certain positions. If an employee has more education‚ they shouldn’t need as much time for training. * Provide necessary training. Training is key in keeping employees around. In an employee has no idea what they
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EMISSIONS FROM ADIPIC ACID AND NITRIC ACID PRODUCTION A C K N O WL E D G E M E N T S This paper was written by Heike Mainhardt (ICF Incorporated) and reviewed by Dina Kruger (USEPA). ABSTRACT Nitrous oxide (N2O) is generated as a by-product during the production of adipic acid and nitric acid. The main use for adipic acid is as a component of nylon-6/6; thus production trends are closely correlated with nylon consumption trends. Worldwide‚ there are very few adipic acid plants. The U.S. is
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