Surname Centre No. Initial(s) Paper Reference 4 3 3 5 Candidate No. 2 H Signature Paper Reference(s) 4335/2H Examiner’s use only London Examinations IGCSE Team Leader’s use only Chemistry Paper 2H Higher Tier Tuesday 6 November 2007 – Morning Time: 2 hours Question Leave Number Blank 1 2 3 4 5 Materials required for examination Nil Items included with question papers Nil 6 7 8 9 Instructions to Candidates In the boxes above‚ write your centre number‚ candidate number‚ your surname
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troubles transitioning from ideas to plans. Key Findings: The price of this raw material could fluctuate wildly‚ from as low as INR 10 per ton to as high as INR 10‚000 per ton. These figures are based upon suppliers’ capacity to store and sell liquid chlorine within their respected licenses. Two methods to create stable bleaching power - adsorption and absorption. Absorption produces better quality‚ while Adsorption is more cost efficient. BBC used adsorption‚ which allows them to pass savings to their
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Reactivity of Halide Ions Purpose: There are four halide salts used in this experiment that are found in the human body. Sodium fluoride is poisonous‚ but has been traced to be beneficial to humans in the prevention of tooth decay. Sodium chloride is added to many of our foods to increase flavor. Sodium chloride is important for many life processes‚ but too much intake is linked to high blood pressure. Sodium bromide is distributed throughout body tissues. Sodium iodine controls cell growth. The
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Planck’s constant‚ and n is the vibrational quantum number. The rigid rotor model also applies to diatomic molecules. It can be solved in the equation below: [pic] where J is the rotational quantum number. Below is a simple picture of a chlorine atom
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English 340.001/Studies in Poetry Professor Goldstein Final Paper Dulce et Decorum Est During World War I there were many advances in chemical warfare. The Allies and the Central Powers were introduced to tear gas‚ chlorine gas‚ mustard gas‚ and many more lethal chemicals. Chlorine gas is a powerful irritant that‚ in high concentrations and much exposure‚ can damage eyes‚ noses‚ throats‚ lungs‚ and even cause asphyxiation. Mustard gas was not always fatal‚ but it blistered skin‚ irritated eyes
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Edexcel Level 3 BTEC Nationals in Applied Science (Forensic Science) Unit 01 – Fundamentals of Science Assignment 01-01‚ Volumetric Analysis Date set: Sept 2010 Date due: Oct 2010 This assignment addresses the following Criteria… Unit 1 – Fundamentals of Science Assessment and grading criteria To achieve a pass grade the evidence must show that the learner is able to: To achieve a merit grade the evidence must show that‚ in addition to the pass criteria‚ the learner is able to: To
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chemicals were by the French in 1914. These chemicals were first used as an irritating substance rather than a fatal or disabling poison‚ until the Germans began experimenting with chemicals. The Germans began the large-scale use of the killing agent chlorine‚ which was more of a psychological weapon. It was easily avoidable due to its easy visibility. The ineffectiveness led to the creation of mustard gas. The skin of victims of mustard gas blistered‚ their eyes became very sore and they began to
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
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SECTION 1 INTRODUCTION CHAPTER # 1 HAIDRI BEVERAGES (PVT) Ltd. ISLAMABAD 1.1. INTRODUCTION Haidri Beverages Islamabad is situated on the Kahota Road industrial Triangle Islamabad. It occupies an area of about 8 acres. It is a private factory. This factory manufactures carbonated beverages and pure water and sells it as Pepsi‚ Miranda‚ 7Up‚ Mountain Dew and Aquafina. To sell these beverages and water‚ factory has got the license from Pepsi Co International (PCI) USA. So that
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Part 1 A） Chemist 1: New product development This career role involves the development of new paints to meet changing market needs. The chemist would be working as a member of a team developing and testing new colloidal paints to suit specific purposes. This might include weatherproof paints‚ which retain their colour and are resistant to solar radiation‚ or indoor paints that can be easily and repeatedly washed. Chemist 2: Environmental monitoring This career role as a public servant could
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