Prevention of Corrosion
Chemistry ⇒ Metals and Non-metals
Prevention of Corrosion starts at 8 and continues till grade 12.
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See sample questions for grade 12
A ship's hull is protected from corrosion by attaching blocks of zinc to it. Explain the role of zinc in this context.
Describe the difference between anodic and cathodic protection.
Describe the principle behind cathodic protection.
Describe the role of inhibitors in the prevention of corrosion.
Explain how painting a metal surface helps in preventing corrosion.
Explain why aluminum does not corrode easily even though it is a reactive metal.
Explain why copper does not corrode as quickly as iron in moist air.
A ship's hull is protected from corrosion by attaching blocks of zinc to it. Explain the role of zinc in this context.
Which of the following alloys is most commonly used for making corrosion-resistant utensils? (1) Brass (2) Bronze (3) Stainless steel (4) Duralumin
Which of the following is a chemical method for preventing corrosion? (1) Painting (2) Greasing (3) Using inhibitors (4) Galvanization
Which of the following is a disadvantage of using electroplating for corrosion prevention? (1) It is expensive (2) It is not effective (3) It weakens the metal (4) It increases corrosion
Which of the following is an example of a natural corrosion inhibitor? (1) Sodium chloride (2) Tannins (3) Sulfuric acid (4) Hydrochloric acid
Fill in the blank: The addition of __________ to steel increases its resistance to corrosion.
Fill in the blank: The chemical formula for rust is __________.
Fill in the blank: The process of coating iron with a layer of chromium is called __________.
Fill in the blank: The process of depositing a thin layer of a less reactive metal on iron to prevent corrosion is called __________.
True or False: Alloying always increases the corrosion resistance of metals.
True or False: Corrosion can be completely prevented by using only one method.
True or False: Corrosion of metals is an example of a redox reaction.
True or False: Electroplating can be used to improve the corrosion resistance of metals.
