JEET SCIENCE ACADEMY CHOWK AZAM (LAYYAH) TIME 2.5 Hr CHEMISTRY 1st YEAR CH # 1‚2‚9‚10 Marks: 85 G.Super . 1 Name…………………………………………...... Objective ROLL NO. ………………………………. Q.NO.1. Encircle the correct answer? (1×17=17) 1. Atoms of which one of the follelement have independent existance: (A) Flourine (B) Krypton (C ) Oxygen (D) Nitrogen 2.18g glucose is dissolved
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2007) (3) William Bonner‚ A (4) Lemieux‚ R. U.; Pavia‚ A. A. Solvation Effects on Conformational Equilibria. Studies Related to the Conformational Properties of 2-Methoxytetrahydropyran and Related Methyl Glycopyranosides. Canadian Journal of Chemistry 1969‚ 1966–1968. (5) M. L. Wolfrom‚ Donald R. Husted; the Beta to Alpha Conversion of Fully Acetylated Sugars by Alkali. J. Am. Chem. Soc.‚ 1937‚ 59 (2)‚ pp 364–365 (6) Perles‚ C (9) Spectral Database for Organic Compounds (SDBS); mass spectrum;
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Anne Of Green Gables - Essay Anne Of Green Gables is a work of children’s literature written by Lucy Maud Montgomery and was first published in 1908. The social and cultural understanding of children depicted during the period in which this novel is set differs greatly from the understandings and expectations of children in today’s society. In the novel Anne Of Green Gables‚ children are depicted as more of a possession to be moulded by their families‚ children were expected to act ‘respectably’
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atoms can rotate and vibrate with respect to each other. These vibrations and rotations also have discrete energy levels‚ which can be considered as being packed on top of each electronic level. UV/Vis spectroscopy is routinely used in analytical chemistry for thequantitative determination of different analytes‚ such as transition metal ions‚ highly conjugated organic compounds‚ and biological macromolecules. Spectroscopic analysis is commonly carried out in solutions but solids and gases may also
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Essay – Red from Green All children need to undertake a journey from being a child to an adult. For some‚ the journey goes very smooth and without any bumps‚ but for other it is a rough journey. This is one of the most crucial themes in the novel “Red from Green” written by Maile Meloy. The novel describes a teenager named Sam who undertake the journey of becoming a woman. The novel explains that Sam is out on a yearly float trip with her father‚ uncle and a client of her uncle. Sam is described
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make generating electricity cleaner and more efficient? Write an essay of between 300 and 370 words on this topic‚ briefly summarising the different solutions to energy storage presented in the text‚ presenting your view on whether energy storage can be a solution to our current energy problems and providing other solutions to the energy problem‚ if relevant. Use specific details and examples to help develop your argument. Green‚ clean and efficient energy is surely the future‚ if our planet shall
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Chemistry Ozone Depletion Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth’s stratosphere (the ozone layer)‚ and a much larger springtime decrease in stratospheric ozone over Earth’s polar regions. The latter phenomenon is referred to as theozone hole. In addition to these well-known stratospheric phenomena‚ there are also springtime polartropospheric ozone depletion events. The
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Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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Sustainable Chemistry Terry Collins* Chemistry has an important role to play in achieving a sustainable civilization on Earth. The present economy remains utterly dependent on a massive inward flow of natural resources that includes vast amounts of nonrenewables. This is followed by a reverse flow of economically spent matter back to the ecosphere. Chemical sustainability problems are determined largely by these economy-ecosphere materials flows (see the figure‚ below)‚ which current chemistry education
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ESSAY DESTRUCTORS BY GRAHAM GREEN A war always leaves a great impact on people´s lives. It changes their temper‚ their lifestyles and‚ thus‚ their relationship with others. The consequences of a war are wisely depicted in Graham Green´s story‚ the destructors‚ through its main characters: Trevor (usually) called to‚ Blakie and “Old Misery”. (Mr. Thomas) To begin with‚ Trevor; T‚ is the latest recruit of the gang. Because of his witty ideas‚ he becomes the leader of it. He is portrayed as a cunning
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