Chemical Reactions & Equations CHEMICAL REACTION : In a reaction when the original state of the particle changes and it cannot be reversed by simple physical means‚ this type of reaction is known as chemical reaction. Example :- Fermentation of grapes‚ burning of wood etc. In this reaction we have seen that after burning of wood‚ coal is formed and we cannot make wood from coal. PHYSICAL REACTION : In a reaction when original state of the particle can be recovered by any means then this type of
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policy of non-interference in the colonies. Town Meetings In New England‚ town meetings were common. They were held annually and were used to discuss issues. Anyone was permitted to speak‚ making them examples of open democracy. I also like ice cream hahaayflower Compact The Mayflower Compact was written around 1620 in Plymouth. It established a government that consented to the will of the majority and was an early form of democracy. Fundamental Orders The colony of Connecticut is only
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his office up with balloons from floor to ceiling. Once starting you realize that this is not going to be some easy task. Thinking fast on your feet‚ and being the the smart chemistry student you are‚ you and your friends go buy oil‚ water and dry ice. With these materials you are able to make a contraption to help blow the balloons up at a fast rate. Considering the time that it takes for the balloons to blow up and the capacity they can hold‚ you were able to calculate the time in which it took
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Garbage Reduction Garbage Reduction Humans have always had an impact on their surroundings. Garbage is one of our biggest effects on nature. Unlike other animals‚ humans create too much waste for nature to keep up. American’s create almost 210 million tons of waste a year. Almost 42 percent of that garbage is in paper wastes. With the continually rising of the earth’s population‚ the situation is going to get harder and harder to slow‚ or fix. With garbage comes pollution. In our burning of
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Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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What is the biggest disadvantage of social media? It’s distracting:I look at my phone instead of doing work at homeI end up doing something you didn’t want to doI want to do productive work but end up looking at my phone instead I don’t give 100% to my work and could do better I take a break and use social mediaWhy do you take a break?I can’t focus 100% in two hours so I take a small breakThe length of and number of breaks I take depends how tired and bored I amIt doesn’t keep me from getting
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Jean Dickson Bertrand Enc 1102 Harris 11:30 February‚ 21 2013 Barn Burning At the end of the 19th Century‚ the southern part of the United States of America suffers considerably. The Great Depression‚ the inter- class conflicts‚ the socio- economic turmoil‚ and the sharecropping structure are among things that can push one with a villain’s core to commit cruel actions. The setting of William Faulkner’s “Barn Burning” demonstrates a vivid picture of life in the south during that period of time
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Chapter 1 ICE BLASTING ____________________________________________________________ ______ 1. Introduction It’s a process in which dry ice pellets are accelerated in a jet of compressed air that strike the coating to be removed at velocities up to the speed of sound. It cleans without the side effects of applications like water jet cleaning‚ sand blasting or solvents. It is a revolutionary alternative to traditional methods of cleaning. This technology is being utilized in
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harmless-looking on the kitchen counter. Yet as soon as you cut an onion‚ the tears begin to fall. What is it in onions that makes them burn your eyes? Why Ice Floats Thomas Northcut‚ Getty Images Can you imagine how different the world around you would be if ice sank? For one thing‚ lakes would freeze from the bottom. Chemistry holds the explanation for why ice floats‚ while most substances sink when they freeze. How Soap Cleans Sean Justice‚ Getty Images Soap is a chemical that mankind has been
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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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