1) Substance producing hydrogen ions when dissolved in water. a) acid b) alkali 2) The positive electrode during electrolysis. a) cathode b) anode 3) The negative electrode during electrolysis. a) cathode b) anode 4) substance formed by the chemical bonding of two or more elements. a) element b) mixture c) compound 5) Take the place of another substance in a chemical reaction. a) neutralise b) oxidise c) reduce d) displace 6) A reaction that occurs when a more reactive element replaces a less reactive element in a compound. a) displacement b) combustion c) thermal decomposition d) redox 7) The decomposition (breakdown) of a compound using an electric current. a) thermal decomposition b) electrolysis c) neutralisation d) combustion 8) A substance which will conduct an electric current. a) salt solution b) electrolyte c) all of these d) molten salt e) metal 9) Subatomic particle, with a negative charge and a negligible mass a) proton b) electron c) neutron 10) An equation, involving ions and electrons, that describes the process happening at an electrode. a) full b) whole c) half d) quarter e) minute 11) Unable to dissolve in a particular solvent. a) soluble b) insoluble 12) Electrically charged particle, formed when an atom or molecule gains or loses electrons. a) sub-atomic b) neutron c) beta particle d) ion 13) bond formed between a metal and non-metal a) ionic b) covalent c) metallic 14) A chemical equation that shows how positively charged ions join with negatively charged ions to make a compound. a) half equation b) ionic equation c) radioactive equation 15) The temperature at which a solid changes into a liquid as it is heated. a) melting point b) boiling point c) sublimation 16) Shiny element that is a good conductor of electricity and heat, and which forms basic oxides. a) halogen b) non-metal c) metal d) noble gas 17) A rock containing enough quantities of a mineral for extraction to be economically worthwhile. a) fraction b) ore c) base d) compound 18) The gain of oxygen, or loss of electrons, by a substance during a chemical reaction. a) reduction b) oxidation 19) A list of elements in order of their reactivity, usually from most reactive to least reactive. a) reactivity series b) pH scale c) Periodic series d) reactivity scale 20) When reduction and oxidation take place at the same time. a) neutralisation b) redox c) decomposition d) combustion 21) The loss of oxygen, gain of electrons, or gain of hydrogen by a substance during a chemical reaction. a) reduction b) oxidation 22) The substance formed when the hydrogen ion in an acid is replaced by a metal ion. a) water b) carbon dioxide c) hydrogen d) salt 23) Substance producing hydroxide ions when dissolved in water. a) acid b) alkali 24) if there is more than enough of it to react with another reactant. a) it is in excess b) the chemist was wasteful 25) Method used to separate an insoluble solid from a liquid using a physical barrier such as paper. a) crystallisation b) filtration c) chromatography 26) Able to ignite and burn. a) volatile b) flammable c) viscous 27) A type of indicator that can be red or blue. a) universal indicator b) litmus paper c) pH paper d) phenolphthalein e) all of these 28) Unable to contain any more liquid. a) fluid b) unsaturated c) saturated d) solid 29) a material which allows an electrical current to pass through it easily. It has a low resistance. a) insulator b) conductor 30) An ion formed when a halogen atom (an atom from group 7) gains one electron. a) salt b) inert compound c) halide d) alkali 31) An element placed in group 7 of the periodic table a) Alkali metal b) alkaline earth metal c) halogen d) noble gas 32) The products of electrolysis of aqueous solution of sodium chloride a) sodium and chlorine b) hydrogen and chlorine c) hydrogen and oxygen d) sodium and oxygen

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