Sample Paper – 2012 Class – X Subject –Chemistry Chemical Equations and reactions Very Short Answer (1 marks each) Write the name and formula of compounds forms between a. Potassium and iodine ion .b.Sodium and sulphide ions . c. Aluminums and chloride ions 2. Why does milk sour when kept for a long time/ 3. What happen when hydrogen combine with oxygen in presence of electric current/ 4. Define electrolysis. 5. What is decomposition reaction? Give an
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Physical Science Review Waves‚ Sound and Light Waves- What are Waves? 1. 1 .The substance that a move through is called a medium. 2. True or False: Particles are squeezed together during rarefactions. 3. True or False: Waves that require a medium through which to travel are called electromagnetic waves. 4. True or False: The matter in the medium moves perpendicular to a transverse wave. 5. What medium is often used to transfer computer information? Optic Fibers 6. 6 .A
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Diamond Chemicals PLC (A): The Merseyside Project Late one afternoon in January 2001‚ Frank Greystock told Lucy Morris‚ “No one seems satisfied with the analysis so far‚ but the suggested changes could kill the project. If solid projects like this can’t swim past the corporate piranhas‚ the company will never modernize.” Morris was plant manager of Diamond Chemicals’ Merseyside Works in Liverpool‚ England. Her controller‚ Frank Greystock‚ was discussing a capital project that she wanted to propose
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layer chromatography can be used as a physical method to segregate compounds from natural sources. E.g. Spinach leaves are visibly green‚ but consist of a variety of components that have more colour than others. This experimental procedure uses compounds from spinach leaves that are exposed to chromatography‚ TLC plate to indicate the different pigments within the spinach extract. ‘Column chromatography in chemistry is a method used to purify individual chemical compounds from mixtures of compounds’
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Courage‚ seven letters‚ two syllables‚ countless meanings. Courage can be shown in many different ways and contexts by different composers. Both moral and physical courage are conveyed in many texts including the film “Life is beautiful” by Roberto Benigni‚ the novel “To Kill a Mocking Bird”‚ directed by Robert Mulligan‚ and the image “Courage‚ bravery doesn’t mean you aren’t scared. It means you go anyway”. In the film ‘Life is Beautiful’‚ the concept of courage is personified through Guido’s
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DE LA SALLE LIPA COLLEGE OF EDUCATION ARTS AND SCIENCES PHYSICAL EDUCATION DEPARTMENT Physical Education Tell me‚ and I may forget. Show me‚ and I may remember. Involve me‚ and I may understand. I. History During the primitive era‚ there was no formal physical education. People went on hunting‚ fishing and running to search for food. In Greece‚ two city states rose above all others‚ Sparta and Athens.The Spartans were conquerors. The Spartans aimed at training a powerful body
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_________________. These synapses are always (excitatory or inhibitory). Advantages of the electrical synapses: 1. _______ signal conduction 2. _____________ activity for a group of neurons. 6. The chemical synapse: Chemical
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After reviewing several articles on the Internet‚ I chose the topic of physical security and an article entitled “Lock IT Down: Don ’t overlook physical security on your network”. This particular article peaked my interest because it addresses the various aspects of physical security that can often be overlooked in a world that is so highly focused on threats of cyberterrorism‚ virus attacks‚ hacking‚ application and network security. What caught my attention was the line‚ “If the server is sitting
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Philosophy on Physical Activity I think that being active is an essential part of life that should be developed early. As Americans we are known for being the fattest nation in the world. This is quite heart breaking. But if we help the children now‚ they can take the knowledge that us learned with them for the rest of their lives and hopefully pass it on to the next generation. In physical education the student should be the most important aspect. Physical education should be a student centered
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because even though the opponents state‚ there are alternatives used in multiple laboratories‚ it is important to know whether these are successful. The second question states‚ does the equal amount of physical pain inflicted on animals similar to humans? I ask this question because animals sense physical pain as humans do‚ therefore‚ there must have been a research done to answer this question. Creating different alternatives began in the 1970s through 1980s‚ which resulted to control animal experimentation
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