CHEMISTRY Guess Paper – 2013 Class – XI Subject - CHEMISTRY MAX MARKS=90 ……………………………………………………………………………………… General instructions: All questions are compulsory. Marks for each question are indicated against it. Questions number 1to 8 are very short –answer questions‚ carrying 1 mark each. Answer these in one word or about one sentence each. Questions number 9 to18 are short –answer questions‚ carrying 2 marks each. Answer these in about 30 words each. Questions number19 to27
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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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experimental techniques which can be used to tell us where the atoms are located in a molecule. Using advanced techniques‚ very complicated structures for proteins‚ enzymes‚ DNA‚ and RNA have been determined. Molecular geometry is associated with the chemistry of vision‚ smell and odors‚ taste‚ drug reactions and enzyme controlled reactions to name a few. Molecular geometry is associated with the specific orientation of bonding atoms. A careful analysis of electron distributions in orbitals will usually
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I. Grade Level/Unit Number: 9-12 Unit 7 II: Unit Title: Mole Concept III. Unit Length: 7 days (on a 90 min. per day block schedule) IV. Major Learning Outcomes: Students should be able to: Mole Concept • Calculate formula mass. • Convert representative particles to moles and moles to representative particles. (Representative particles are atoms‚ molecules‚ formula units‚ and ions.) • Convert mass of atoms‚ molecules‚ and compounds to moles and moles of atoms
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My Journal Monday (09.07.2012) We arrived at Bengaluru International Airport around 5.25 pm and we set our watches to Bengaluru time which is 2½ hours later than Malaysian time. After 4 hours in Airasia AK1212‚ we finally reached Bangalore for our conference tomorrow. We stayed in Woodlands Hotel and it is about 1 hour journey from the airport. Our conference will be held in ITC Gardenia‚ the first green hotel in the world which is just across the road from where we stayed. Tuesday (10
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Anne Morrow Lindbergh once said‚ "Good communication is as stimulating as black coffee and just as hard to sleep after." She was exactly right. Communication is the process of sending information through common media such as verbal speech‚ gestures‚ body language‚ and feedback. It is a two part process; first the "speaker" or "sender" transmits the information and then waits for the feedback. The "receiver" or "listener" receives the information and then sends feedback. This process is constantly
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Computers grew rapidly and widely used through out the world.They are used to deal with many tasks due to their various potential.Therefor‚they have much influence on our life.Their impact can be classified into three catogories; communication‚facilities and medical care. First of all‚computer can improve quality of communication.Nowaday‚barries seem to be gradually destroyed. Computer can bring people closer together and facilitate contacts between them.For example‚people can
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Organometallic preparation and addition to carbonyls‚ Wittig reagent preparation and Wittig rxn‚ Wolff‚ H-based nucleophile carbonyl reduction‚ imine formation‚ reductive amination (rxn only)‚ ketal/acetal formation‚ dithiane chemistry (rxn only)‚ alpha-bromination of ketones‚ -COOH properties (the trends on HW4)‚ Fischer‚ acidic/basic hydrolysis of esters/amides/nitriles‚ CH2N2‚ acid chloride formation (rxn only)‚ acid chloride rxns with esters and amides. 2 Rxn of carboxyllic acid derivatives
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Mass media has become an integral part of our lives and can not be separated from our life. Particularly for the urban people‚ the need for information is more important than ever. Our values and way of life in the society in this information era are strongly influenced by the mass media like newspapers‚ TV‚ radio‚ video‚ and the internet. Mass media’s influence on people’s lives is even greater and deeper than many kinds of state indoctrination or priest’s sermons from the pulpit in the church
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EXPERIMENT 2: SYNTHESIS OF ORANGE II (2-NAFTHOL ORANGE OBJECTIVE 1. To produce dye based to the coupling of diazonium. 2. To understand the characteristic of dye orange II. INTRODUCTION The first dye was introduced by William Henry Perkin on 1856. It can be produced by the coupling of diazonium sulfanilic acid with nafthol in alkaline solution.. This was the common method used to produce dye nowadays. In this experiment‚ dye produced was the orange II. Azo compound is compound that contain
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