CBSE TEST PAPER-03 CLASS - X (Chemical Reactions and equations) 1. Take about 5 ml of dil. HCl in a test tube and add a few pieces of fine granules to it. Which gas is evolved? (a) Chlorine (b) Hydrogen (c) HCl (d) Nitrogen 2. Dissolving suger is an example of(a) Physical change (b) Chemical change (c) Redox Reaction (d) None of these. 3. Heat is evolved diving (a) Endothermic Reaction (b) Displacement Reaction (c) Combustion Reaction (d) Combination Reaction 4. Which of the following is not a balanced
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complex reactions and reaction sequences‚ where raw materials react together to give the product. Such chemical process often releases energy‚ in the form of heat‚ and the reaction is described as exothermic. Many of these reactions may also evolve gases at high rates‚ and could cause reactor over-pressure. Thermal runaway reaction Runaway reactions are thermally unstable reactions where the heat of reaction can raise the temperature of the reactants sufficiently to accelerate the reaction rate out
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Objective of the report Understand job stress and its nature‚ Understand theoretical viewpoints of stress‚ Discuss how it has affected employees in United States and Japan. 1.Introduction Modern businesses are complex and highly competitive consequently employees‚ management of the organization as well as organization itself under contentious strain to accomplish higher targets (Rothmann et al‚ 2005). In recent time’s organizations around the world restructuring‚ outsourcing and downsizing
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Elimination Reactions ________________________________________ As described previously‚ primary alkyl halides generally undergo substitution reactions with simple nucleophiles by an SN2 mechanism. Secondary alkyl halides‚ often react with simple basic nucleophiles to give a mixture of products arising from both substitution and elimination. As with substitution reactions‚ the rate at which elimination reactions proceed can be proportional to both the concentration of the base and the concentration
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Polymerization reaCTIONS polymers are high-molecular-weight compounds‚ fashioned by the aggregation of many smaller molecules called monomers. Ex. plastics that have so changed society and the natural and synthetic fibers used in clothing are polymers. Classification of polymers Homopolymers - consist of repeated long chains or structures of the same monomer unit. Ex. PVC(polyvinyl chloride) Copolymers - polymers that consist of more than one molecule. Trimers - molecules consisting
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Job satisfaction is the very important factor in general quality of life because it is closely connected with working life. There are many definitions of job satisfaction. According to Spector (1997‚ p.2) Job satisfaction is: “simply how people feel about their jobs and different aspects of their jobs. It is the extent to which people like or dislike their jobs. It can also be considered as a global feeling about the job”. Colquitt‚ Lepine and Wesson (2009‚ p.105) defined job satisfaction as “a pleasurable
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MS 405 Assignment #3 1- In an experiment subjects are given between the two gambles: Gamble 1: A: $2500 with probability 0.33 $2400 with probability 0.66 $0 with probability 0.01 Gamble 2: C: $2500 with probability 0.33 $0 with probability 0.67 B: $2400 with certainty D: $2400 with probability 0.34 $0 with probability 0.67 Suppose that a person is an expected utility maximizer. Set the utility scale so that u($0) = 0 and u($2500)=1. Denote u($2400) by x. a) Which one would you prefer
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ENGINEERING Reaction Engineering CGC035 / CGC052 Problem Sheet 3 - Fluid-fluid reactions 1. The reaction rate for the heterogeneous reaction A(g) + B(l)→ products is second order according to the expression -rA=kCACB and it is relatively slow compared to mass transfer so it takes place in the bulk of the liquid. Combine the following rate expressions for diffusion through the gas and liquid films‚ -rA=kAga(pA-pAi) and -rA=kAlaCAi-CA‚ with Henry’s law pAi=HACAi and the reaction rate
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Chemical Reactions Chemical Change • reorganization • original substances form new substances with different formulas • may or may not involve a change of state • symbols used to describe chemical reaction are known as a chemical equation • Chemical equations do not have equal signs (=) they have an arrow Chemical Equations • Must follow the Law of Conservation of Matter • atoms can neither be created or destroyed during a chemical reaction • What
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and the viewer‚ get to witness the corruption first hand for the first thirty minutes of the movie. Wakefield does not have guards‚ but instead‚ trusties who basically have free reign over the prison. The trusties are allowed to carry a weapon and get time off of their sentences for shooting escapees‚ and this holds most of the blame for the brutality that went on inside Wakefield. The conditions inside the prison were beyond terrible‚ and the commonplaces included beatings‚ bribery‚ rape‚ and slum
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