e1an 0.0 / 5 ? ChemistryElectricity and chemistryIGCSECIE Created by: e1anCreated on: 13-12-18 13:00 What is exothermic reaction? Reaction during in which energy in the form of heat is given out. 1 of 15 What is endothermic reaction? Reaction during which heat is taken in. 2 of 15 Reversible reaction? Reaction during which the reactants can be obtained from the products. 3 of 15 Irreversible reaction? The reactants cannot be obtained back. 4 of 15 Oxidation Loss of electrons. 5 of 15 Reduction Gain of electrons. 6 of 15 Redox reaction A reaction involving both oxidation and reduction. 7 of 15 Electrolysis It is a process in which a chemical reaction is caused by the passage of electricity. 8 of 15 Positive electrode Anode - It attracts negative ions (anions). 9 of 15 Negative electrode Cathode - It attracts positive ions (cations). 10 of 15 Electrolysis of a salt solution (aqueous) As the ease of discharge. 11 of 15 Electrolysis of a dilute aqueous In anode, always OH goes, while in cathode as the ease of discharge. 12 of 15 Electrolysis of concentrated Same as salt solution. 13 of 15 Uses of cryolite 1. To reduce the melting point of Alumina from 2000C to 800-1000C.| 2. To make the process economical by saving energy. 14 of 15 Ore of aluminium Bauxite. 15 of 15
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