ron 54 Chemistry/Cor cans used for canning food are usually coated with tin instead of zinc. This is because A. tin is more reactive than zinc. B. tin ions are non-toxic but zinc ions are toxic. C. tin forms an alloy with iron and this alloy is corrosion resistant. D. tin prevents iron cans from rusting by sacrificial protection. 0. Which of the following statements correctly describe(s) the advantage(s) of using aluminium over iron to make soft drink cans? (1) Aluminium is stronger than iron. (2) Aluminium is less dense than iron. (3) Aluminium is more corrosion-resistant than iron. A. (1) only B. (2) only C. (1) and (3) only 11. Which of the following statements concerning aluminium is correct? A. Aluminium is used to make stainless steel. B. The strength of aluminium can be enhanced by anodization. Aluminium is the most abundant element in the earth's crust. C. D. Aluminium can be extracted from aluminium oxide by electrolysis of the molten oxide. silver strip dish 1 12. Rust indicator solution was poured into the following glass dishes to cover the iron nails, which were wrapped with different metal strips. The dishes were allowed to stand in air for some time. zinc strip dish 2 D. (2) and (3) only copper strip dish 3 magnesium strip dish 4 In which of the dishes would the blue colour be observed? A. dish 1 only B. dish 2 only C. dish 1 and dish 3 only D. dish 2 and dish 4 only 13. Anodised aluminium is more commonly used than iron for making window frames. This is because (1) The cost for extracting aluminium is lower than the cost for extracting iron. (2) Anodized aluminium is more corrosion resistant than iron (3) Anodized aluminium is harder than iron. A. (1) only B. (2) only C. (1) and (3) only D. (2) and (3) only in made object?

Tro, Nivaldo J.