Aluminium is extracted by theAreduction of its oxide with carbonBelectrolytic decomposition of its molten oxide aloneCelectrolytic decomposition of its molten oxide in cryoliteDreduction of the molten oxide in cryolite using carbon monoxide

Aluminium is manufactured by the electrolysis of aluminium oxide dissolved in molten cryolite.At the anode, oxide ions react to make oxygen molecules.Construct the ionic half-equation for this electrode reaction

Why cannot aluminium be obtained by reduction of its oxide with carbon

This question is about electrolysis, extraction of metals, and properties of materials.Describe the process of extracting aluminium from its ore, including the role of cryolite and the reactions at each electrode. Write half equations where appropriate.

Which of the following statements is true?Metal ions always lose electrons at the cathodeMetal ions always lose electrons at the anodeMetal ions always gain electrons at the cathodeMetal ions always gain electrons at the anode2How is aluminium extracted from the earth?As an aluminium ore known as cryoliteAs an aluminium ore known as bauxiteAs aluminium oxideAs pure aluminium3In the electrolysis of aluminium oxide, the electrodes are made of carbon in the form of graphite. Which of the following statements is not true?The presence of carbon electrodes reduces the amount of energy required for the electrolysis reactionAt extremely high temperatures, the oxygen produced during electrolysis reacts with the carbon anode to form carbon dioxideGraphite is used as an electrode because it is a good conductor of electricityCarbon is relatively unreactive, and the electrodes do not therefore react with the aluminium oxide during electrolysis4Why is molten cryolite mixed with the aluminium oxide prior to electrolysis?To increase the temperature required for the reactionTo hold the electrodes in placeTo act as a conductor of electricityTo lower the temperature required for the reaction5What is the balanced equation for the electrolysis of aluminium oxide?2Al2O3(l) → 3Al(l) + 4O2(g)Al2O3(l) → Al(l) + O2(g)2Al2O3(l) → 4Al(l) + 3O2(g)3Al2O3(l) → 6Al(l) + 3O2(g)

Why Al metal cannot be obtained by the reduction of Aluminium oxide with coke?