Chemistry 0.0 / 5 ? Chemistrykey termsGCSEOCR Created by: tialouise1234Created on: 25-03-16 11:28 A soluble base with a pH greater than 7. Makes OH- ions in water Alkali 1 of 20 Saturated hydrocarbon with a general formula CnHn2n+2 e.g Methane (CH4) Alkane 2 of 20 Unsaturated hydrocarbon which contains a carbon-carbon double bond. Its general formula is CnH2n e.g Ethene (C2H4) Alkene 3 of 20 A mixture of metals (and sometimes non metals) e.g Brass= copper and zinc Alloy 4 of 20 Fitted to the exhausts of vehicles to reduce pollutants released Catalytic converter 5 of 20 A substance that speeds up a chemical reaction but remains chemically unchanged itself at the end of the reaction Catalyst 6 of 20 A covalent bond made by the sharing of 2 pairs of electrons Double bond 7 of 20 The breakdown of a substance containing ions by electricity Electrolysis 8 of 20 A liquid, containing free moving ions, that is broken down by electricity in the process of electrolysis Electrolyte 9 of 20 A substance made up of one type of atom Element 10 of 20 A substance which helps keep immiscible liquids (e.g oil and water) mixed so they do not separate into layers Emulsifier 11 of 20 A mixture of liquids that do not dissolve in each other Emulsion 12 of 20 A reaction that takes in energy from the surroundings Endothermic 13 of 20 An alkene with the formula C2H4 Ethene 14 of 20 Hydrocarbons with similar boiling points operated from crude oil Fraction 15 of 20 Separation of many substances in a mixture by heating, using the fact that they have different boiling points Fractional Distillation 16 of 20 Two or more atoms held together by covalent bonds Molecule 17 of 20 Large molecule formed when many smaller molecules bond together Polymer 18 of 20 A chemical reaction joining monomers in a long chains to form a polymer Polymerisation 19 of 20 A mineral or rock that contains a useful substance that can be mined for profit. Ore 20 of 20
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