English Proficiency This test is designed to assess the test takers’ general proficiency in the use of English language as a means of self-expression in real life situations and specifically to test the test takers’ knowledge of basic grammar‚ their vocabulary‚ their ability to read fast and comprehend‚ and also their ability to apply the elements of effective writing. 1. Grammar 1. Agreement‚ Time and Tense‚ Parallel construction‚ Relative pronouns 2. Determiners‚ Prepositions‚ Modals
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Bonding structure Metals: metallic bonding Ionic compound (metal +nonmetal): ionic bonding Molecule (nonmetal +nonmetal): covalent bonding 3.1 Metallic Bonding 1) Definition The electrostatic attraction between a lattice if positive ions and delocalized electrons. 2) The strength of metallic bonding (depend on) Delocalized electrons (=valence electrons=Group number) More valence electrons‚ stronger metallic bonding Ionic radii (=distance between nucleus and e-) Greater ionic radius
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VL-A111H/hyou; 01/11/15/18:00 Operation Summary LIQUID CRYSTAL DISPLAY CAMCORDER MODEL Playback Useful Features Sharp House‚ Thorp Road‚ Newton Heath Manchester M40 5BE References PAL If you require any advice or assistance regarding your Sharp product‚ please visit our web-site www.sharp.co.uk/ support. Customers without Internet access may telephone 08705 274277 during office hours (or (01)676 0648 if telephoning from Ireland) . Advanced Features Please read
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for each from the given options: i) The atomic number of an element belonging to group VA and 3rd period is: * 7 * 13 * 15 * 23 ii) Elements of group IB are called: * Normal elements * Rare Earth metals * Coinage metals * Alkali metals iii) Hydride ion and Helium atom have the same: * number of protons * number of electrons * number of neutrons * valency iv) The number of neutrons in Protium is: * zero * 1 * 2 * 3 v) The element having the symbol ‘Ga’ belongs to this family: * Carbon *
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challenges‚” in Proc. IEEE Power Eng. Soc. General Meeting‚ Denver‚ CO‚ Jun. 2004‚ pp. 1641–1646. [34] K [35] F. R. Kalhammer‚ P. R. Prokopius‚ V. P. Roan‚ and G. E. Voecks‚ “Fuel cells for future electric vehicles‚” in Proc. 14th Annu. IEEE Battery Conf. Applicat. Advances‚ Long Beach‚ CA‚ Jan. 1999‚ pp. 5–10. [36] L [37] H. P. Schoner and P. Hille‚ “Automotive power electronics: new chal-lenges for power electronics‚” in Proc. 31st IEEE Power Electron. Spec. Conf.‚ Jun. 2000‚ vol. 1
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Borneol; An Oxidation-Reduction Scheme Nicolas Gibson Lab Time: Tuesday 11:30 am Abstract: In this experiment‚ the main objective was to synthesize a ketone from borneol via an oxidation reaction and secondly‚ to produce a secondary alcohol from camphor via a reduction reaction. Therefore‚ the hypothesis of this lab is that camphor will be produced in the oxidation reaction and isoborneol will be the product of the reduction reaction because of steric hindrance. For the oxidation
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THERMOCHENISTRY Index 1.0 Introduction | | | | | | | | 1 | 2.0 Enthalpy Changes | | | | | | | 2‚3 | 2.1 The Standard Conditions For Calculating Enthalpy Changes | | | | 3.0 Hess’s Law | | | | | | | | 4‚5 | 3.1 The Applications of Hess’s Law | | | | | | 4.0 Standard Molar Enthalpy Change of Formation‚ ΔHof | | | | 6‚7 | 4.1 The Stability of A Compound | | | | | | | 4.2 Using ΔHof
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MAJENGO SECONDARY SCHOOL CHEMISTRY TEST FORM VI JULY 2013 TIME: 2 HOURS SECTION A Answer all questions 1. a) A coordination compound has a formula Co Cl3. 4NH3. It does not liberate ammonia but precipitates one mole of chloride ions with Ag No3. i. Give IUPAC name of the complex ii. Write it’s structural formula a) Give chemical tests to distinguish [Co Br (NH3) 5] S04 and [Co (NH3)5 SO4] Br 2. Give IVPAC Names of the following i. K2 [ptF6] ii
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Conversion of Alcohols to Alkyl Halides Ankita Patel August 6‚ 2013 Introduction This lab consisted of the conversion of alcohols into alkyl halides through common substitution methods. These methods include SN1 and SN2 mechanism‚ both of which can occur for this type of reaction. For both reactions‚ the first step of protonation will be to add hydrogen to the –OH group and then the rest of the reaction will proceed according to the type of mechanism. SN1 reactions form a cation intermediate
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PCl5-phosphorous pentachloride N2O5-dinitrogen pentoxide METAL AND NON-METAL METALS WITH FIXED OXDATION NUMBER-Give the name of the positive ion followed by the negative ion ending with –ide Al+3 O-2 =Al2O3 =aluminum oxide Mg+2 H- =MgH2 =magnesium hydride METALS WITH VARIABLE OXDATION NUMBER -ROMAN NUMERAL METHOD -give the name of the positive atom followed by the name of the negative ion ending with –ide. - The only difference here is that we have to specify the charge of the metal ion
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