General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om 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 answer sheet in the spaces provided unless this has been
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process of distillation. Distillation is the separation of volatile substances mixed with nonvolatile substances by boiling the mixture to alter the phase of the volatile substance. The researchers used the simple distillation set up to conduct the experiment. 25 ml of The Bar Vodka was used and 7 ml of distillate was collected before a temperature of 95 degrees Celsius was reached. Collected distillate was then subjected to a flammability test to confirm ethanol content. The percent ethanol was computed
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satisfied about their selves. In fact‚ the concept of success is obviously different among people. Money and wealth are the popular belief of success‚ but a great number of people believe that money is not the signal for success. There are various measurements of success such as wining world championship‚ winning awards‚ breaking records and so on. Hence‚ this essay will explain the two standards of being successful. To begin with‚ being peaceful and satisfied in own life is a success for some people
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Chem 3418 Organic Chemistry Laboratory I Acid Base Review Definition In general‚ an acid is a substance that can donate a proton (H+) and a base is a substance that can accept a proton. Any proton in an organic molecule can potentially be donated. The most acidic proton in a molecule would be donated first. Any lone pair in an organic molecule can act as the proton acceptor. An acid (HA) reacts with a base (in this case H2O) to form the conjugate base of the acid (A-) and the conjugate acid of the
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1.0 Introduction Performance measurement is essential to improve the performance of the organizations to compete in today’s business environment. In the era of industry way back in the 1960’s‚ the traditional performance measurement system has been designed to report labour productivity‚ machine and capacity utilization‚ and standard cost variances. These are cost-efficiency-based measures derived from a strategy to minimize production costs‚ described as a cost leadership strategy. (usefulness
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Experiment 1: Errors‚ Uncertainties‚ and Measurements Laboratory Report Margarita Andrea S. de Guzman‚ Celine Mae H. Duran‚ Celina Angeline P. Garcia‚ Anna Patricia V. Gerong Department of Math and Physics College of Science‚ University of Santo Tomas España‚ Manila Abstract Measurements‚ defined as a comparison with a standard‚ are essential in the study of physics. However‚ all measurements are prone to errors. There are two sources of errors: systematic errors random errors.
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Lab Report: MEASUREMENT OF VITAMIN C Introduction Nutritional diseases were once the number one cause of death only a century ago‚ but rarely affect our lives today. The complete lack of vitamin C (ascorbic acid) characterized by dark purple spots on the skin and rotting gums‚ a disease called scurvy‚ took the lives of many sailors up until the mid 1800s when the prevention was discovered. Consequently‚ British sailors became referred to as ‘limeys’ because of their daily habit of eating
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Performance measurement‚ Compensation and Multinational Considerations Mukhammadbobir 1401617 Faruddin 1401625 Louis Awu 14016 Performance Measurement is generally defined as regular measurement of outcomes and results‚ which generates reliable data on the effectiveness and efficiency of programs. Performance measures quantitatively tell us something important about our products‚ services‚ and the processes that produce them. They are a tool to help us understand‚ manage‚ and improve what our
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ical Chemistry 1.which of the following pairs of compound will react? iC3H6+Br2 iiC3H6+Cl2 in sunlight iiiC3H6+H2O in the presence of sulphuric acid ivC3H6+H2O in the presence of concentrated sulphuric acid a.i b.i‚iii c.i‚ii‚iii d.all 2.liqiud y reacts with magnesium metal to produce a gas that burns with a pop sound when a flaming wooden splint is placed near it.liqiud y is most likely a compound that has the formula a.c2h5oh b.hcooh c.h3cooch3 d.c6h14 3.a compound p has the
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Chemistry * a science that dealing with the structure‚ composition and properties of items and with the transformations that they undergo * the composition and chemical properties of a substance * chemical processes and phenomena (as of an organism) Examples: - Digestion; enzymes promoting chemical reactions that power our bodies. Lifting your arm requires your body to make and burn ATP using oxygen with carbon dioxide as one of the waste gases produced. - The internal combustion
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