CHM 138H INTRODUCTORY ORGANIC CHEMISTRY I TERM TEST II March 18th 2010 TOTAL MARKS: 70 NAME (PRINT): ___________________________ Student #: ______________________ TUTORIAL GROUP #: ___________ Answer all questions in the spaces provided on the accompanying answer sheet. It is attached to the back of the test paper. You may detach the answer sheet. Nothing on this question sheet will be marked. PRINT YOUR NAME‚ STUDENT NUMBER‚ and TUTORIAL GROUP NUMBER on this test
Premium Chemical reaction Chemistry Multiple choice
different spatula on the Bunsen flame. Indicate the color of the flame produced by `X` and `Y`. Identify `X` and `Y`. Write the structural formulae. 4. A compound `X` has molecular formula C4H10. It undergoes substitution reaction readily than addition reaction. It burns with blue flame and is present in LPG. Identify `X` and give the balanced equation for its combustion and substitution reaction with Cl2 in presence of sunlight. 5. `A` compound works well with hard water. It is used for making
Premium Oxygen Chemistry Chemical reaction
iodine will be added to a test tube using a dropper in lieu of a graduated cylinder. Appearance of solution will be recorded. Then‚ 1mL of hexane will be added to the test tube mix. Observations of both layers will be recorded. Process repeated for bromine. For the third solubility test‚ 1mL of hexane will be added to a clean test tube. Then‚ 0.5mL of Clorox and 0.5M HCl (to make chlorine) are added. The color of each layer is noted. Part III: Electronegativity Testing This set of reactions
Premium Chlorine Electronegativity
a long shelf-life‚ requiring them to be stable over a sustained period of time. Thus‚ a study that explores the efficacy of the various cryoprotectants on the long-term stability of the CUR-CS-P-NPs for up to 6-12 months should be carried out‚ in addition to determining the optimum storage conditions. This would then clarify which cryoprotectant offers the best protection for the nanoparticles under
Premium Scientific method Statistics Research
BROMINATION OF ACETANILIDE OBJECTIVE Aim of the experiment was too brominate acetaldehyde to form p-bromoacetanilide. INTRODUCTION Acetanilide is a chemical compound with the chemical formula of C6H5NH(COCH3). It is a crystalline solid that is prepared by acetylation of analine and is widely used in the dye industry. This crystalline solid is an odourless solid chemical that has a flake or leaf like appearance. It is also known as N phenylacetamide‚ acetanil or acetanilide. Its former
Premium Acetic acid Oxygen Ethanol
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 details of polar ozone hole formation differ from that of mid-latitude thinning‚ but the most important process in both is catalytic destruction
Premium Ozone depletion Ultraviolet
involved carrying out the first three parts of the Cyclohexanol Cycle. The cyclohexanol was first converted to cyclohexene and water by simple distillation (product: 6.5395g‚ 79.75% recovery). The cyclohexene then underwent a bromination reaction by addition of concentrated HBr and a 30% H2O2 solution‚ followed by an extraction of the aqueous phase. This produced trans-1‚2-dibromocyclohexane (product: 12.8886g‚ 67.34% recovery). The trans-1‚2-dibromocyclohexane was reduced by zinc metal to cyclohexene
Premium Chemistry
for changes in colors of precipitates or solutions. For Dische Test‚ light blue was obtained for RNA and dark violet for DNA. For Murexide Test‚ a yellow layer was obtained with a mixture of red color and eventually became yellow or orange after addition of warm water. For John-Wheeler Test‚ a violet precipitate was obtained and lastly for Phosphate Test‚ a yellow precipitate was obtained. Keywords: Nucleic Acids‚ Dische Test‚ Murexide Test‚ Phosphate Test‚ Wheeler-Johnson Test1. IntroductionThe
Free DNA RNA
Grignard reaction. As the reaction was to set up to produce a Grignard reagent and then recrystallize it to obtain pure sample. The percentage yield obtained was 55% and its melting point was 161 co which is within the literature value 160-163 co. In addition to that the IR spectroscopy confirmed the molecule structure to be triphenylmethanol. Introduction: The Grignard reagents are alkyl magnesium halides‚ R-Mg-X were first introduced in 1900. These reagents are usually prepared by reacting one atom
Premium Alcohol Ethanol Functional group
molecules hold them together. The larger the molecule (as it moves down the halogen group) the bigger the intermolecular forces are between electrons because with more rings the distance between each electron is larger. The larger elements such as Bromine and Iodine are larger molecules with a larger amount of intermolecular force between each electron. This increase in intermolecular attraction means that the required heat energy to reach the boiling point increases. Fluorine has a significantly lower
Premium Chlorine Bromine