Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?
Correct answer: D. aluminium is resistant to corrosion by organic acids.Chemistry
- A. aluminium can be recycled
- B. aluminium has very low density
- C. aluminium is the most abundant metal in the earth crust
- D. aluminium is resistant to corrosion by organic acids.Chemistry
Explanation
Aluminium rapidly forms a thin, adherent aluminium oxide film that protects the metal from further corrosion, making it suitable for contact with acidic fruit drinks. Its low density and recyclability are useful advantages, but they do not explain its chemical resistance to the contents. A student may choose b because aluminium cans are lightweight, confusing a physical advantage with the most important chemical reason.
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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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