8th Class Science Chemical Effects of Electric Current Question Bank Chemical Effects of Electric Current

  • question_answer
    Why is zinc better than tin for electro- plating a piece of iron in order to prevent it from rusting?

    A)  Zinc is cheaper than tin.

    B)                         Tin is toxic.

    C)                         Zinc can prevent iron from coming into contact with water and air.

    D)                         Rusting is prevented even when the zinc layer is broken.

    Correct Answer: D

    Solution :

    Zinc can be better than tin for protecting iron from rusting because, zinc being highly electropositive can prevent rusting even when the layer is broken.


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