The process of aluminium extraction is called__________________?
Correct answer: A. Hall process
- A. Hall process
- B. Thermite process
- C. Haber process
- D. Contact process
Explanation
Aluminium is extracted industrially by the Hall-Heroult process, in which purified alumina is electrolysed in molten cryolite. Students often choose b because the thermite process also produces aluminium-related metals, but thermite is mainly used to obtain or weld metals such as iron, not to extract aluminium.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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