Metal And Electrolysis Test Review
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The process of electrolysis is a technique wherein a direct electric current is utilised in order to achieve a chemical reaction that otherwise wouldn’t be expected. What can you tell us about how this process works? Take the quiz below and we’ll find out together!
- 1.
What is the main reducing agent in the reduction of iron ore?
- A.
Carbon monoxide
- B.
Slag
- C.
Carbon dioxide
- D.
Oxygen
Correct Answer
A. Carbon monoxideExplanation
Carbon monoxide is the main reducing agent in the reduction of iron ore. It reacts with iron oxide in a high-temperature environment to form iron metal and carbon dioxide. This process is known as the blast furnace process and is commonly used in the production of iron and steel. Carbon monoxide has a strong affinity for oxygen and can easily remove oxygen from iron oxide, resulting in the reduction of iron ore to iron metal.Rate this question:
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- 2.
What are the main impurity in iron ore?
- A.
Steel
- B.
Rock
- C.
Silica
- D.
Limestone
Correct Answer
C. SilicaExplanation
Silica is the main impurity in iron ore. Silica, also known as silicon dioxide, is a common mineral that is found in many rocks and minerals. In iron ore, silica is often found in the form of quartz. It is considered an impurity because it can affect the quality of the iron produced from the ore. High levels of silica can cause the iron to become brittle and difficult to work with. Therefore, in the process of refining iron ore to produce steel, it is important to remove as much silica as possible.Rate this question:
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- 3.
What is the definition of electrolysis?
- A.
The passage of a direct electric current through a solution containing ions
- B.
The use of an electric current to reduce iron ore
- C.
The process used to grow hair
- D.
Lightening
Correct Answer
A. The passage of a direct electric current through a solution containing ionsExplanation
Electrolysis is the process of using a direct electric current to drive a non-spontaneous chemical reaction. It involves the passage of the current through a solution that contains ions, which allows for the separation of the ions and the production of new chemical compounds. This process is commonly used in various industries, such as metal extraction, electroplating, and water purification. It is not related to the growth of hair or lightening.Rate this question:
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- 4.
What is the use of limestone in reducing iron ore?
- A.
Used to produce heat in blast furnace
- B.
It has no use
- C.
Reacts with the iron to make it explode
- D.
Added to the iron ore in a blast furnace, where it reacts with silica, and separates into iron and slag
Correct Answer
D. Added to the iron ore in a blast furnace, where it reacts with silica, and separates into iron and slagExplanation
Limestone is added to iron ore in a blast furnace because it reacts with silica present in the iron ore. This reaction helps in separating the iron from the impurities and forms a slag. The slag is then removed, leaving behind purified iron. Therefore, limestone plays a crucial role in the reduction of iron ore by facilitating the separation of iron and slag in a blast furnace.Rate this question:
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- 5.
What is slag used for?
- A.
Pottery
- B.
Mixed with concrete to pave roads
- C.
Cereal
- D.
Made into utensils
Correct Answer
B. Mixed with concrete to pave roadsExplanation
Slag is a byproduct of metal smelting or refining processes. It is commonly used as a material in road construction and paving. When mixed with concrete, slag enhances its durability, strength, and resistance to wear and tear. The addition of slag also helps to reduce the environmental impact of concrete production by reducing the amount of cement required. Therefore, slag is commonly used in the construction industry to pave roads and highways.Rate this question:
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- 6.
Define Anion:
- A.
An ion with a positive charge that moves towards the negative electrode during electrolysis
- B.
An ion with a negative charge that moves towards the positive electrode during electrolysis
- C.
A positively charged electron by which electrons leave an electrical device
- D.
Electrolysis is the passage of a direct electric current through a solution containing ions.
Correct Answer
B. An ion with a negative charge that moves towards the positive electrode during electrolysisExplanation
An anion is defined as an ion with a negative charge that moves towards the positive electrode during electrolysis. This means that during the process of electrolysis, where an electric current is passed through a solution containing ions, the anion will be attracted to the positive electrode. This is because opposite charges attract each other.Rate this question:
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- 7.
What is the charge of Potassium?
- A.
K++
- B.
K-
- C.
K+
- D.
K--
Correct Answer
C. K+Explanation
Potassium has a charge of K+. This means that it has lost one electron and has a positive charge of +1. The symbol K+ indicates that the potassium ion has one less electron than the neutral potassium atom.Rate this question:
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- 8.
What are the most commonly found iron ores?
- A.
Hematite and Magnetite
- B.
Silica and Limestone
- C.
Selamite and Hepatite
- D.
Hematite and Yellamite
Correct Answer
A. Hematite and MagnetiteExplanation
Hematite and Magnetite are the most commonly found iron ores. Hematite is a red-colored ore that contains iron and is often used in jewelry. Magnetite is a black-colored ore that is magnetic and has a high iron content. Both of these ores are widely available and are used in various industries for the production of iron and steel.Rate this question:
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- 9.
List the diatomic elements:
- A.
H, N, L, K, Cl, Fl, B
- B.
H, O, C, Mg, Cl, Ag, Na
- C.
H, N, O, F, Cl, I, Br
- D.
M, A, D, I, S, O, N,
Correct Answer
C. H, N, O, F, Cl, I, BrExplanation
The correct answer is H, N, O, F, Cl, I, Br. These elements are considered diatomic because they exist naturally as molecules composed of two atoms bonded together. In their elemental form, hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), iodine (I), and bromine (Br) are all found as diatomic molecules.Rate this question:
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- 10.
Define electrolyte:
- A.
A little electron
- B.
A negatively charged compound
- C.
A compound that in its molten or aqueous state conducts electricity
- D.
A special electrode
Correct Answer
C. A compound that in its molten or aqueous state conducts electricityExplanation
An electrolyte is a compound that is able to conduct electricity when it is in a molten or aqueous state. This is because in these states, the compound dissociates into ions, which are charged particles that can move and carry electric current. Therefore, an electrolyte allows the flow of electric charge through its solution or when it is melted, making it an essential component in many electrochemical processes and devices.Rate this question:
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- 11.
True or False? A Cathode is a negatively charged electrode that is the source of electrons entering an electronic device.
- A.
False
- B.
True
Correct Answer
B. TrueExplanation
A cathode is indeed a negatively charged electrode that is the source of electrons entering an electronic device. This is because during the process of electron flow, the cathode attracts and emits electrons, which then move towards the positively charged anode. Therefore, the given answer, "True," is correct.Rate this question:
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- 12.
What would be the product of electrolysis in the following compound: PbBr2 (s)
- A.
It remains a solid
- B.
Pb (l) 2Br (g)
- C.
Pb (g) Br (l)
- D.
It does not react
Correct Answer
A. It remains a solidExplanation
The product of electrolysis in the compound PbBr2 (s) would be that it remains a solid. This means that the compound does not undergo any chemical reaction or change in state when subjected to electrolysis.Rate this question:
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- 13.
How is Coke produced?
- A.
Mixing bubbles and flavoring
- B.
Heating limestone in a blast furnace
- C.
In the extraction of iron ore
- D.
Heating coal in the absence of air
Correct Answer
D. Heating coal in the absence of airExplanation
Coke is produced by heating coal in the absence of air. This process is known as carbonization and it involves heating coal at high temperatures to drive off volatile components and leave behind a solid, carbon-rich material called coke. Coke is used as a fuel and as a reducing agent in the production of iron and steel.Rate this question:
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- 14.
True or false? A cation is an ion with a positive charge that moves towards the negative electrode during electrolysis.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
A cation is an ion with a positive charge. During electrolysis, cations are attracted to the negative electrode, which is also known as the cathode. Therefore, the statement that a cation moves towards the negative electrode during electrolysis is true.Rate this question:
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- 15.
How much of the Earth's crust is made of iron?
- A.
5.6%
- B.
20.3%
- C.
0%
- D.
50.5%
Correct Answer
A. 5.6%Explanation
Approximately 5.6% of the Earth's crust is made of iron. Iron is one of the most abundant elements in the Earth's crust, along with oxygen, silicon, and aluminum. It is found in various minerals, such as hematite and magnetite, and is an essential component of many rocks and soils. While iron is present in significant quantities, it does not make up the majority of the Earth's crust, with other elements and compounds comprising the remaining 94.4%.Rate this question:
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- 16.
What is stainless steel used for?
- A.
Phones, books
- B.
Cutlery, cooking utensils, kitchen sinks
- C.
Computers, tables, bridges
- D.
Walls
Correct Answer
B. Cutlery, cooking utensils, kitchen sinksExplanation
Stainless steel is commonly used for cutlery, cooking utensils, and kitchen sinks because of its excellent corrosion resistance and durability. It is a popular choice for these applications as it does not rust or stain easily, making it suitable for contact with food and water. Additionally, stainless steel is easy to clean and maintain, making it ideal for use in the kitchen.Rate this question:
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- 17.
Silica is in what state at room temperature?
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
England
Correct Answer
A. SolidExplanation
Silica is a chemical compound that exists in a solid state at room temperature. It is commonly found in nature as quartz, and it is widely used in various industries due to its hardness and resistance to high temperatures. Silica's solid state is a result of its atomic structure and the strong bonds between its silicon and oxygen atoms.Rate this question:
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- 18.
What is used industrially to reduce iron ore?
- A.
A fire pit
- B.
A blast furnace
- C.
An oven
- D.
Microwave
Correct Answer
B. A blast furnaceExplanation
A blast furnace is used industrially to reduce iron ore. This is because a blast furnace is specifically designed for the purpose of extracting iron from its ore through a process called smelting. The furnace operates at extremely high temperatures and utilizes a combination of heat, carbon, and oxygen to reduce the iron oxide in the ore, resulting in the production of molten iron. This molten iron can then be further processed and used for various industrial applications.Rate this question:
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- 19.
Carbon dioxide reacts with coke to form?
- A.
They don't react
- B.
Silica
- C.
Carbon dioxide
- D.
Carbon monoxide
Correct Answer
D. Carbon monoxideExplanation
When carbon dioxide reacts with coke, it undergoes a chemical reaction to produce carbon monoxide. Coke, which is a form of carbon, acts as a reducing agent in this reaction. The carbon dioxide is reduced, meaning it gains electrons, while the coke is oxidized, meaning it loses electrons. This reaction is commonly used in industries such as iron and steel production, where carbon monoxide is an important intermediate in the process.Rate this question:
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- 20.
Did you enjoy this quiz?
- A.
Yes!
- B.
No.
- C.
I love chemistry
- D.
Sure?
Correct Answer(s)
A. Yes!
C. I love chemistryExplanation
The correct answer is "Yes!, I love chemistry" because it directly answers the question and expresses a positive sentiment towards the subject of chemistry. The other options either do not provide a clear response or do not relate to the question at hand.Rate this question:
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Current Version
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Mar 15, 2024Quiz Edited by
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Jan 06, 2010Quiz Created by
Me0614
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