VOL 20 NO 157 REGD NO DA 1589 Dhaka‚ Saturday‚ May 04‚2013 http://www.fe-bd.com/index.php?ref=MjBfMDVfMDRfMTNfMV8yN18xNjgzMjU= Of disasters‚ negligence and liability: Nimtoli tragedy revisited Published : Saturday‚ 04 May 2013 In case of fire in garment factories and accidents in unauthorized buildings‚ the regulators like the Fire Service or Rajuk come up with arguments that the factories or buildings do not have licence or permission‚ But they cannot avoid the ‘tortfeasor
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result of experiment. Methodology Materials and Apparatus The chemicals used in the experiment are as follows: benzoic acid‚ sugar‚ denatured alcohol‚ chloroform‚ acetanilide‚ copper sulfate‚ activated charcoal‚ distilled water‚ acetone‚ toluene‚ glutamic acid and glycine. The apparatus used include funnel‚ Erlenmeyer flask‚ separatory funnel‚ beakers‚ evaporating dish‚ water bath‚ graduated cylinder‚ stirring rod‚ watch glass‚ distilling flask‚ thermometer‚ tripod‚ wire gauze‚ burner‚ iron
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Chromatographic Analysis of a Commercial Analgesic’s Active Component I. Abstract This study on Chromatographic Analysis of a Commercial Analgesic’s Active Component seeks to separate‚ identify‚ quantify and analyze the active component found in Biogesic®‚ which may be useful for public awareness despite its wide acceptance and availability in the market. Furthermore‚ this study applies thin layer chromatography (TLC) technique since it is the simplest‚ cheapest yet most effective approach in terms
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Mary Eunice Agapito‚ Denmarc R. Aranas*‚ Limuel Joseph V. Bacani‚ and Steven Arthur Baluyot Analysis of Hydrocarbons Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract In this experiment we performed parallel chemical test method to identify an unknown. The reflux setup was used to prevent evaporation in mixing the reactants in an inert solvent with its boiling point. Another highlight of this experiment is the liquid-liquid extraction wherein a solution containing
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Test Booklet Code - NO.: ABC 2216302 This Booklet contains 20 pages. Do not open this Test Booklet until you are asked to do so. Impoutant Instructions : 1. 2. The Answer Sheet is inside this Test Booklet. When you are directed to open the Test Booklet‚ take out the Answer Sheet and fill in the particulars on side-1 and side-2 carefully with blue/ black ball point pen only. The test is of 3 hours duration and Test Booklet contains 180 questions. Each question carries 4 marks
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Chapter 1 MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. A) B) C) D) E) In quantum mechanics a node (nodal surface or plane) is: a place where Ψ is negative. a place where Ψ is positive. a place where Ψ = 0. a place where Ψ2 is large. a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals‚ Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule‚ how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5 Ans:
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GENERAL AND ENVIRONMENTAL IMPACTS OF NUCLEAR BOMBS According to the movie‚ TRINITY AND BEYOND: THE ATOMIC BOMB MOVIE‚ on July the sixteenth year 1945‚ at a site called "Trinity"‚ a plutonium bomb ’ was piled and taken up the top of a tower. This plutonium bomb ’ was exploded thereby generating a very high measure of flash light and a fireball that radiated through 0.6 kilometers (0.37 miles) in 2 seconds. The detonative energy or power was equivalent to 18.6 kilotons of TNT. This fume grew up
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EXPERIMENT 2: Recrystallization and Melting Point Recrystallization (or Crystallization) is a technique used to purify solids. This procedure relies on the fact that solubility increases as temperature increases (you can dissolve more sugar in hot water than in cold water). As a hot‚ saturated solution cools‚ it becomes supersaturated and the solute precipitates (crystallizes) out. In a recrystallization procedure‚ an impure (crude) solid is dissolved in a hot solvent. As this solution is cooled
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Air Pollution * Pollutants enter the air from various sources‚ but burning of fossil fuels contributes the most to air pollution. * Exhaust fumes from vehicles contains soot (tiny carbon particles)‚ lead (from cars using unleaded petrol)‚ carbon monoxide‚ oxides of nitrogen and hydrocarbons due to the incomplete combustion of fossil fuels. * Burning of fossil fuels in the combustion engines of vehicles and electrical power stations also releases large amount of carbon dioxide into the
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Hydraulic fracturing is a process used in nine out of 10 natural gas wells in the United States‚ where millions of gallons of water‚ sand and chemicals are pumped underground to break apart the rock and release the gas. Scientists are worried that the chemicals used in fracturing may pose a threat either underground or when waste fluids are handled and sometimes spilled on the surface. The natural gas industry defends hydraulic fracturing‚ better known as fracking‚ as safe and efficient. Thomas J
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