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General Chemistry 1

General Chemistry 1


Group Leader : Prof. Kristiina Wähälä, University of Helsinki, FI ( wg.gcx@echemtest.eu )

Public : This test has been designed to evaluate a level of competence in chemistry equivalent to that expected at the end of compulsory education.

Duration : You may answer the questions in any order during 60 minutes.

Structure : The test consists of 30 questions covering the 10 topics given below, with 10 questions at each 3 levels of difficulty (introductory, intermediate, advanced).

  1. Composition of matter: Classification of matter (pure substance, mixture) - Solutions (saturated solution) - Separation methods (filtration, extraction, evaporation, distillation)
  2. Atoms and elements: Structure of atom nucleus (number of protons, electrons and neutrons) - Structure of electron cloud - Periodic Table (principles of placing elements, period, group) - Properties of alkali metals, halogens and noble gases - Atomic weight, Molecular weight, Formula weight - Mole and Avogadro's number
  3. Types of Chemical reaction: Acids and bases (hydronium and hydroxide ions, pH scale, neutralization, indicators, buffer solutions) - Endothermic and exothermic reactions - Chemical equations - Factors which affect reaction rates (T, nature of reactants, surface area, concentration, catalyst)
  4. Chemical bonding: Energy and stability - Role of valence electrons - Ionic bond (structure and formulas of ionic compounds) - Covalent bond (molecules or giant structure) - Water as a solvent (polarity of water molecule) - Metallic bond - Intermolecular forces
  5. Solid, liquid and gas state: Simple models of solid and gas state
  6. Chemistry in our environment: Atmosphere (structure, importance of oxygen, ozone and carbon dioxide, greenhouse effect, pollution) - Water ( water cycle, specific properties, diffusion, osmosis) - Acids and bases (acidic and basic oxides, acid rain) - Basic industry (HCl, H2SO4, HNO3, NaOH, different methods to produce salts, water of hydration, Nitrogen cycle, fertilizers)
  7. Organic chemistry: Oil and oil industry - Carbon, hydrocarbons, multiple bonds, alcohols, carboxylic acids, esters, carbohydrates, proteins, fats) - Addition polymers - Photosynthesis
  8. Metals: Production from ore, properties (periodic table, metallic bonding, reactivity with oxygen and acids)
  9. Electrochemistry: Activity series, corrosion - Electrolysis
  10. Life span of different products (some examples): Waste, paper, plastics, paints, cosmetics, textiles, detergents, glas, construction materials and water

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