Corrosion is a chemical reaction that involves:

The surface of the object changing from an element to a compound

The inside of the object changing from an element to a compound

The surface of the object changes from one element into another element.

Which of the following is not an example of physical protection?

Attaching the metal to the negative terminal of a battery

What type of protection is galvanizing?

Physical and sacrificial protection

Corrosion Questions: Chemistry Quiz!

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1/11 Questions

Corrosion is a chemical reaction that involves:
- The inside of the object changing from an element to a compound
- The surface of the object changing from an element to a compound
- Nothing happens
- The surface of the object changes from one element into another element.

About This Quiz

Explore the fundamentals of corrosion in this engaging Chemistry quiz! Learn about the chemical reactions involved in corrosion, conditions for rusting, the impact of salt on corrosion rate, and the specific case of iron rusting. Essential for students and professionals interested in material science and chemical engineering.

Corrosion Questions: Chemistry Quiz! - Quiz

2.

Rusting is a special term, given to the corrosion of which metal?
- Zinc
- Copper
- Nickel
- Iron
Correct Answer

A. Iron

Explanation

Rusting is a special term given to the corrosion of iron because iron readily reacts with oxygen and water in the presence of air, leading to the formation of iron oxide, commonly known as rust. This process occurs when iron is exposed to moisture and oxygen over time, causing it to deteriorate and weaken. Zinc, copper, and nickel can also corrode, but the term "rusting" specifically refers to the corrosion of iron.

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3.

What conditions are required for rusting to take place?
- Water only
- Oxygen only
- Water and oxygen
- Water and carbon dioxide
Correct Answer

A. Water and oxygen

Explanation

water and oxygen (from the air) are required for rusting.

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4.

Ferroxyl indicator changes color in the presence of Fe²⁺ ions.
- Stays yellow
- Yellow --> Pink
- Yellow --> Blue
- Pink --> Yellow
Correct Answer

A. Yellow --> Blue

Explanation

Ferroxyl indicator turns blue in the presence of Fe2+ ions.

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5.

Corrosion is an example of?

Correct Answer
oxidation

Explanation
Corrosion is an example of oxidation because it involves the reaction of a metal with oxygen in the presence of water or moisture. During corrosion, the metal atoms lose electrons and are oxidized, while oxygen gains electrons and is reduced. This process leads to the formation of metal oxides or hydroxides, causing the metal to deteriorate and weaken over time. Therefore, corrosion can be considered as a specific type of oxidation reaction that occurs specifically with metals.

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3
6.

What effect does salt have on the rate of corrosion?
- No effect
- Speeds up corrosion
- Slows down corrosion
Correct Answer

A. Speeds up corrosion

Explanation

Salt acts as an electrolyte and speeds up corrosion.

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7.

Which of the following is not an example of physical protection?
- Greasing
- Painting
- Attaching the metal to the negative terminal of a battery
- Electroplating
- Galvanising
Correct Answer

A. Attaching the metal to the negative terminal of a battery

Explanation

The other 2 types of physical protection are tin-plating and coating with plastic. Physical protection puts a layer between the metal and water/oxygen.

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8.

Which of the following metals would protect iron by electrons flowing to the iron?
- Magnesium
- Silver
- Tin
- Copper
Correct Answer

A. Magnesium

Explanation

Magnesium is higher than iron in the electrochemical series. It will protect the iron by sacrificing itself to protect the iron. electrons will flow from Mg --> Fe

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2
9.

When objects (gates) are galvanized, what metal is used to protect the iron.
- Aluminium
- Copper
- Nickel
- Zinc
Correct Answer

A. Zinc

Explanation

Galvanising is covering with a layer of zinc.

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5
10.

What type of protection is galvanizing?
- Physical protection
- Sacrificial protection
- Physical and sacrificial protection
- None of the above.
Correct Answer

A. Physical and sacrificial protection

Explanation

Covering with a layer of zinc excludes water/oxygen - physical protection, Zinc is higher that iron in the Electrochemical series, so it will corrode to protect the iron (Sacrificial protection)

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5
11.

Explain the effect of scratching a tin-plated (iron) object has on the rate of corrosion.

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Current Version
Mar 22, 2023

Quiz Edited by
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Jan 26, 2010

Quiz Created by
Lslater

Corrosion Questions: Chemistry Quiz!

Corrosion is a chemical reaction that involves:

Quiz Preview

Rusting is a special term, given to the corrosion of which metal?

What conditions are required for rusting to take place?

Ferroxyl indicator changes color in the presence of Fe2+ ions.

Corrosion is an example of?

What effect does salt have on the rate of corrosion?

Which of the following is not an example of physical protection?

Which of the following metals would protect iron by electrons flowing to the iron?

When objects (gates) are galvanized, what metal is used to protect the iron.

What type of protection is galvanizing?

Explain the effect of scratching a tin-plated (iron) object has on the rate of corrosion.

Ferroxyl indicator changes color in the presence of Fe²⁺ ions.