Corrosion Questions: Chemistry Quiz!
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Questions and Answers
- 1.
Corrosion is a chemical reaction that involves:
- A.
The inside of the object changing from an element to a compound
- B.
The surface of the object changing from an element to a compound
- C.
Nothing happens
- D.
The surface of the object changes from one element into another element.
Correct Answer
B. The surface of the object changing from an element to a compoundExplanation
For example, Iron metal changes from Fe --> Fe2+ ionsRate this question:
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- 2.
Rusting is a special term, given to the corrosion of which metal?
- A.
Zinc
- B.
Copper
- C.
Nickel
- D.
Iron
Correct Answer
D. IronExplanation
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.Rate this question:
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- 3.
What conditions are required for rusting to take place?
- A.
Water only
- B.
Oxygen only
- C.
Water and oxygen
- D.
Water and carbon dioxide
Correct Answer
C. Water and oxygenExplanation
water and oxygen (from the air) are required for rusting.Rate this question:
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- 4.
Ferroxyl indicator changes color in the presence of Fe2+ ions.
- A.
Stays yellow
- B.
Yellow --> Pink
- C.
Yellow --> Blue
- D.
Pink --> Yellow
Correct Answer
C. Yellow --> BlueExplanation
Ferroxyl indicator turns blue in the presence of Fe2+ ions.Rate this question:
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- 5.
Corrosion is an example of?
Correct Answer
oxidationExplanation
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.Rate this question:
- 6.
What effect does salt have on the rate of corrosion?
- A.
No effect
- B.
Speeds up corrosion
- C.
Slows down corrosion
Correct Answer
B. Speeds up corrosionExplanation
Salt acts as an electrolyte and speeds up corrosion.Rate this question:
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- 7.
Which of the following is not an example of physical protection?
- A.
Greasing
- B.
Painting
- C.
Attaching the metal to the negative terminal of a battery
- D.
Electroplating
- E.
Galvanising
Correct Answer
C. Attaching the metal to the negative terminal of a batteryExplanation
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.Rate this question:
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- 8.
Which of the following metals would protect iron by electrons flowing to the iron?
- A.
Magnesium
- B.
Silver
- C.
Tin
- D.
Copper
Correct Answer
A. MagnesiumExplanation
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 --> FeRate this question:
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- 9.
When objects (gates) are galvanized, what metal is used to protect the iron.
- A.
Aluminium
- B.
Copper
- C.
Nickel
- D.
Zinc
Correct Answer
D. ZincExplanation
Galvanising is covering with a layer of zinc.Rate this question:
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- 10.
What type of protection is galvanizing?
- A.
Physical protection
- B.
Sacrificial protection
- C.
Physical and sacrificial protection
- D.
None of the above.
Correct Answer
C. Physical and sacrificial protectionExplanation
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)Rate this question:
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- 11.
Explain the effect of scratching a tin-plated (iron) object has on the rate of corrosion.
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Jan 26, 2010Quiz Created by
Lslater
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