Corrosion of Metals
Chemistry ⇒ Metals and Non-metals
Corrosion of Metals starts at 8 and continues till grade 12.
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See sample questions for grade 12
A steel bridge is exposed to a coastal environment. Suggest two methods to protect it from corrosion and explain your choices.
Describe the chemical reaction that leads to the rusting of iron.
Describe the difference between dry and wet corrosion.
Describe the effect of temperature on the rate of corrosion.
Describe the role of moisture in the corrosion of metals.
Describe the role of oxygen in the corrosion of iron.
A metal sample loses 0.5 g of mass after 30 days due to corrosion. Calculate the average rate of corrosion in mg/day.
A steel bridge is exposed to a coastal environment. Suggest two methods to protect it from corrosion and explain your choices.
Which of the following is a correct statement about corrosion? (1) It only occurs in metals (2) It is always beneficial (3) It can be prevented by using alloys (4) It is a physical change
Which of the following is a sacrificial anode in the protection of iron structures? (1) Copper (2) Zinc (3) Silver (4) Gold
Which of the following is an example of a corrosion inhibitor? (1) Sodium chloride (2) Phosphoric acid (3) Water (4) Oxygen
Which of the following is NOT a factor affecting the rate of corrosion? (1) Temperature (2) Surface area (3) Color of metal (4) Presence of impurities
Fill in the blank: The corrosion of silver in the presence of hydrogen sulfide forms ________.
Fill in the blank: The electrochemical series helps predict the ________ of metals to corrosion.
Fill in the blank: The presence of ________ ions in water accelerates the corrosion of iron.
Fill in the blank: The process of applying a protective layer of another metal to prevent corrosion is called ________.
True or False: All metals corrode at the same rate under identical conditions.
True or False: Corrosion always requires the presence of water.
True or False: Corrosion can lead to structural failure of bridges and buildings.
True or False: Corrosion can only occur in the presence of oxygen.
