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Test: Corrosion of Metals & Galvanisation - Year 11 MCQ


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10 Questions MCQ Test - Test: Corrosion of Metals & Galvanisation

Test: Corrosion of Metals & Galvanisation for Year 11 2024 is part of Year 11 preparation. The Test: Corrosion of Metals & Galvanisation questions and answers have been prepared according to the Year 11 exam syllabus.The Test: Corrosion of Metals & Galvanisation MCQs are made for Year 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Corrosion of Metals & Galvanisation below.
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Test: Corrosion of Metals & Galvanisation - Question 1

What is the key chemical process involved in the rusting of iron?

Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 1
The rusting of iron is primarily a process of oxidation. When iron comes into contact with oxygen and water, it undergoes oxidation, leading to the formation of hydrated iron(III) oxide, commonly known as rust.
Test: Corrosion of Metals & Galvanisation - Question 2

Why is calcium chloride included in the third test tube in the rusting investigation experiment?

Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 2
Calcium chloride is included in the third test tube to eliminate moisture from the air within the test tube. By removing moisture, calcium chloride helps create a dry environment, preventing the presence of water that is essential for the rusting of iron to occur. Test on Rust Prevention Methods #
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Test: Corrosion of Metals & Galvanisation - Question 3

What method can hinder rust formation on iron by applying protective coatings that create barriers?

Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 3
Barrier methods involve applying protective coatings on iron surfaces to prevent direct contact with water and oxygen, thus hindering rust formation. If these coatings are damaged or removed, allowing exposure to water and oxygen, rusting can occur once more. This method acts as a shield against the elements, preserving the iron from corrosion. #
Test: Corrosion of Metals & Galvanisation - Question 4
In the experiment involving three test tubes to investigate rusting, why does only the iron nail in the first test tube exhibit signs of rusting after several days?
Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 4
The iron nail in the first test tube is the only one to exhibit rusting because it is exposed to both oxygen and water, which are necessary for the rusting process to occur. The presence of oxygen and water allows the iron to undergo oxidation, leading to the formation of rust.
Test: Corrosion of Metals & Galvanisation - Question 5
Why does the presence of both oxygen and water play a crucial role in the rusting process?
Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 5
Oxygen plays a critical role in oxidizing the iron during the rusting process, while water provides the medium for this reaction to take place. Without either oxygen or water, the rusting of iron would not occur as both are essential components for the formation of rust.
Test: Corrosion of Metals & Galvanisation - Question 6
How does the removal or damage of protective coatings impact rusting on iron surfaces?
Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 6
When protective coatings on iron surfaces are removed or damaged, it accelerates the rusting process. This exposure allows water and oxygen to reach the iron surface, initiating the chemical reaction that leads to rust formation. Therefore, maintaining intact protective barriers is crucial in preventing rust from developing on iron materials. #
Test: Corrosion of Metals & Galvanisation - Question 7
Why is it important to maintain the integrity of protective coatings on iron surfaces for rust prevention?
Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 7
Maintaining the integrity of protective coatings on iron surfaces is crucial to prevent direct contact between the iron material and water and oxygen. By creating a barrier that shields the iron from these elements, the protective coatings help inhibit the chemical reactions that lead to rust formation. Therefore, ensuring the durability and effectiveness of these coatings is essential in preserving the iron and preventing corrosion.
Test: Corrosion of Metals & Galvanisation - Question 8
Which elements are essential for rust formation on iron surfaces?
Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 8
Rust formation on iron surfaces primarily requires the presence of water and oxygen. When iron is exposed to moisture (water) and oxygen in the air, a chemical reaction known as oxidation occurs, leading to the formation of rust. This process can be prevented or slowed down by inhibiting direct contact between iron, water, and oxygen. #
Test: Corrosion of Metals & Galvanisation - Question 9
How can iron be protected from rusting using the reactivity series?
Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 9
Iron can be protected from rusting by attaching a more reactive metal to it, following the principle of sacrificial protection. In this process, the more reactive metal will corrode first, thus safeguarding the less reactive iron. An example of this is using zinc bars on steel ships, where zinc, being more reactive than iron, sacrifices itself by corroding first, protecting the steel from rusting.
Test: Corrosion of Metals & Galvanisation - Question 10
What is the primary purpose of galvanising iron with a zinc coating?
Detailed Solution for Test: Corrosion of Metals & Galvanisation - Question 10
Galvanising iron with a zinc coating is done primarily to prevent rusting. The zinc coating acts as a protective barrier for the iron, even if the coating gets damaged. This process involves either electroplating or zinc immersion, creating a shield that helps in maintaining the integrity and longevity of the iron by preventing oxidation and rust formation.
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