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
Free Chemical reaction Hydrogen Nitrogen
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
Premium Chemical reaction Bhopal disaster
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
Premium Organic reaction Alkene
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
Premium
Knocked Up & The Waitress: Compare and Contrast Knocked Up and The Waitress are two intriguing movies made in the same year. They both show the absurd side of pregnancy as well as the more realistic sensible side. Both of these movies are similar and different in numerous ways. Knocked Up is about a woman who puts herself in a very difficult situation‚ and has to deal with an unplanned pregnancy after being careless during her night out. The Waitress is about a woman in an abusive marriage who
Premium Childbirth Pregnancy Uterus
1. Introduction 3 2. The Teenage Movie 3 3. The City and City Theories 4 4. Urban Spaces and Teenage Movies 5 4.1. The Public Bedroom 6 4.2. The Threatening Public Space 7 4.3. Public Space made Private 9 6. Conclusion 11 Bibliography 12 1. Introduction This essay will discuss the use of urban spaces with respect to female (lead) characters in the so called teenage movies. The focus lies on film because it has the potential to influence people on how they perceive the outside world
Premium Sociology Public space Public library
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
Premium Chemical reaction Chemical engineering Chemistry
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
Free Chemical reaction Hydrogen Chemistry
Like most young guys I like movies very much. Movies in English are an effective tool for learning English. I remember when I went to New Oriental to study English I always worried about my poor listening skill. Then I accepted a teacher’s advice and started to watch some English movies. I can learn some useful words and expressions from them. Gradually I found that English is not so difficult to understand and it became more and more interesting to me. Now I can say movies not only improve my listening
Premium Film Silent film Actor
Reaction Paper I watched this movie entitled “Real Steel”. This story revolves around the father‚ the son whom he abandoned and the robot that the boy found. After watching the movie‚ and applying the concept of leadership into it‚ I may say that the true leader is the boy and the new leader is his father. In that movie‚ the eleven year old boy was able to stand for what he believes‚ to fight for what he loves‚ to influence a person towards a goal and brings out the best in him. Though he is
Premium Leadership Skill Management