Corrosion and Its Prevention
Chemistry ⇒ Redox Reactions and Electrochemistry
Corrosion and Its Prevention starts at 12 and continues till grade 12.
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A piece of iron is placed in a solution containing both Cu²⁺ and Zn²⁺ ions. Which metal will deposit on the iron surface, and why?
A ship's hull is protected from corrosion by attaching blocks of zinc. What is the role of zinc in this case?
A steel bridge is exposed to a marine environment. Suggest two methods to prevent its corrosion and explain how they work.
A steel water tank is coated with a layer of zinc. If the zinc layer is damaged, will the steel underneath corrode? Explain your answer.
A metal M is placed in a solution of its own ions. If the standard electrode potential of M is lower than that of hydrogen, will M corrode in acidic solution? Yes or No.
A piece of iron is placed in a solution containing both Cu²⁺ and Zn²⁺ ions. Which metal will deposit on the iron surface, and why?
A ship's hull is protected from corrosion by attaching blocks of zinc. What is the role of zinc in this case?
A steel bridge is exposed to a marine environment. Suggest two methods to prevent its corrosion and explain how they work.
The rusting of iron involves which of the following processes? (1) Only oxidation (2) Only reduction (3) Both oxidation and reduction (4) Neither oxidation nor reduction
Which of the following best defines corrosion? (1) The process of metal extraction from ores (2) The slow destruction of metals by chemical or electrochemical reaction with their environment (3) The process of alloy formation (4) The process of metal refining
Which of the following is a chemical method of corrosion prevention? (1) Painting (2) Applying oil (3) Using corrosion inhibitors (4) Electroplating
Which of the following is an example of sacrificial protection? (1) Painting iron gates (2) Coating iron with tin (3) Attaching a magnesium block to an underground iron pipe (4) Using stainless steel
Fill in the blank: The chemical formula of rust is __________.
Fill in the blank: The electrode where oxidation occurs during corrosion is called the __________.
Fill in the blank: The process of coating iron with a layer of zinc to prevent corrosion is called __________.
Fill in the blank: The process of corrosion in which two dissimilar metals are in contact in the presence of an electrolyte is called __________ corrosion.
A metal M is placed in a solution of its own ions. If the standard electrode potential of M is lower than that of hydrogen, will M corrode in acidic solution? Yes or No.
Corrosion is an example of a redox reaction. True or False?
True or False: Corrosion always results in the formation of oxides.
True or False: Corrosion can only occur in the presence of water.
