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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Structure Elucidation 2. Ozonolysis of compound Z yields the products shown below. What is the structure of Z? O Z 1) O3 2) Zn‚ HOAc O 2HCH + CH3CCH2CH O I II III O H IV A) B) C) D) E) O V I II III IV V Ans: B 242 Keghan Chapter 8 Topic: Structure Elucidation 3. Compound C has the molecular formula C7H12. On catalytic hydrogenation‚ 1 mol of C absorbs 1 mol of hydrogen and yields a compound with the molecular formula C7H14. On ozonolysis
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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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Lincoln’s Ten-Percent Plan: 1863–1865 Events 1863 Lincoln issues Proclamation of Amnesty and Reconstruction 1864 Congress passes Wade-Davis Bill; Lincoln pocket-vetoes it 1865 Lee surrenders to Grant at Appomattox Courthouse Congress creates Freedmen’s Bureau Lincoln is assassinated; Johnson becomes president Key People Abraham Lincoln - 16th U.S. president; proposed Ten-Percent Plan for Reconstruction in 1863; assassinated by John Wilkes Booth in 1865 Andrew Johnson - 17th U.S. president;
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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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shape of the yield curve. In your answer also discuss the uses of the yield curve in financial markets‚ why strips are used in the construction of yield curves and why investors would want to invest in zero coupon bonds or strips. The yield curve is a graph that plots the yields of similar-quality bonds against their maturities‚ ranging from shortest to longest. The relationship between yield and maturity is referred to as the term structure of interest rates. The Treasury yield curve is the
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Lab experiment 12 Percent of water in a hydrate The goal of Experiment 12 was to learn how to calculate the percent of water (by mass) in barium chloride and an unknown hydrate salt‚ as well as properly calculating the water of crystallization for the unknown hydrate salt. A hydrate salt is composed of anions (-) and cations (+) surrounded by a fixed number of water molecules‚ called water of crystallization. The hydrate decomposes upon heating and
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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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Financial Institutions and Markets Jim Wilcox Bond Yields‚ Returns‚ Risks‚ and Duration • • • • • Bonds and Loans Yields and Returns Price Volatility and Risk in Default-Free Bonds Measuring Interest Rate Risk Duration: Types‚ Calculation‚ Meaning‚ Uses • Next Time: Chapter 11 re: Duration Week # 2 January 28‚ 2014 1 Coming Soon! What We Did 1. 2. 3. 4. Week # 2 January 28‚ 2014 2 Yield to Maturity (YTM): A Result‚ Not a Cause! • YTM = percentage rate
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Cacao Yield Maximizing yield for farmers has become the main objective in business agriculture and because of this there has been a frequent reoccurring theme of large-scale plantations being less efficient in terms of yield than small-scale farms. Specifically‚ the smaller cacao yield in the large plantation is due to biodiversity‚ natural habitats‚ and most importantly‚ community ecology. The cacao plant’s productivity is heavily dependent on their age‚ planting density‚ plant variety‚ soil
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