UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
Premium Oxygen Hydrochloric acid Ammonia
A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electromagnetic force attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds" such as dipole-dipole interactions‚ the London dispersion force and hydrogen bonding
Premium Chemical bond Covalent bond
Melting point‚ TLC‚ IR‚ 1H and 13C NMR Abstract: The synthesis of the product: β-D-glucose pentaacetate is done though the acetylation using acetic anhydride with D-glucose with the help of sodium acetate. The recrystallization of the product is done though a polar solvent like water. The Result of this experiment has a percentage yield of 61% and analytical methods that are to detect the products are 1H NMR‚ 13 C NMR‚ COSY‚ FTIR (IR)‚ Thin Layer Chromatography (TLC) and Melting point. Introduction:
Premium Acetic acid Nuclear magnetic resonance Solvent
MOLECULAR GEOMETRY Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It determines several properties of a substance including its reactivity‚ polarity‚ phase of matter‚ color‚ magnetism‚ and biological activity.[1][2] The angles between bonds that an atom forms depend only weakly on the rest of molecule‚ i.e. they can be understood as approximately local and hence transferable properties. The specific three dimensional arrangement of atoms in molecules
Premium Molecule Electron Atom
Organic Chemistry II Laboratory (ABCT357) Although studying fundamental theories of chemistry in the class is important to understand the concept of chemistry‚ carrying out experiments to corroborate the theories is also important. It is very important for students to get used to experiments in order to speed up their experiments. Expt.1. Acetylation of α-D-glucopyranose Add slowly 2.5 g (0.014 mol) of powdered D-glucose in small portions (roughly in 7-10 portions and 5 min for each addition)
Premium Acetic acid Carboxylic acid Nuclear magnetic resonance
heading is included and your answers are correctly numbered. The assignment must have a completed cover sheet. It must be placed in the drop-box on or before the deadline. st SECTION A ELECTRONIC STRUCTURE & IONIZATION ENERGY 1. 2. Write the electronic structure in s‚p‚d notation of the following: O‚ Na‚ Na+‚ Al‚ Cl- and Co (Total 6 Marks) Write the electronic configuration in box notation of the following: N‚ Si and Ni (Total 3 Marks) 3. Write the electronic
Premium Sodium hydroxide Enthalpy Hydrochloric acid
Being able to extract a compound or substance from a product or object will encourage us in being able to do the same in a similar manner with a tea solution. Extracting compounds is an important step in any kind of organic chemistry lab and will help us be better at accomplishing the experiment in a much faster and accurate rate than from before. Experimental To begin the experiment‚ a tea solution must be made by incorporating a tea bag into a beaker filled with almost boiling water and the
Premium Caffeine Tea Water
Review Packet for midterm 1 10/2/2013 Nikki Stefanko & Stephanie Ventura 24 1. Cortisol is a steroid hormone produced by the adrenal cortex that is released in response to stress and a low level of blood glucocorticoids. OH O OH HO H H
Premium
perpetual bond is currently selling for RS. 95/-. The coupon rate of interest is 13.5%. The approximate discount rate is 15%. The value of the bond and the YTM is: (a) Rs. 90/- and 14.2% Value is (13.5*15%=90) and YTM is ((13.5/95)*100=14.21%) (b) Rs. 100/- and 13.5% (c) Rs. 90 and 15% (d) Rs. 90/- and 13.5% 902. In 2001‚ Meridian Ltd. has issued bonds of Rs. 10‚000/-each due in 2011 with a 14% per annum coupon rate payable at the end of each year during the life of the bond. If the required
Premium Bond Bonds
NAME: MASSAWE BARAKA‚ REG. NO: 2010-04-03894. 12 FINANCE 202 INDIVIDUAL ASSIGNMENT UDBS Consider a 10 year bond that has a face value shs 1000‚ a coupon rate of 6% and pays interest once a year. (a)Suppose person A bought this bond at par when it was initially issued and sold it 1 year later to person B for shs 1024.What is B’s total return? Soln Total return =[ Interest paid +(selling price – buying price)]/buying price Given; Annual interest paid = coupon rate x par value‚ coupon
Premium Rate of return Interest Time value of money