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Grade 11 Exam  >  Grade 11 Tests  >  Chemistry for Grade 11 (IGCSE)  >  Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Grade 11 MCQ

Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Grade 11 MCQ


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15 Questions MCQ Test Chemistry for Grade 11 (IGCSE) - Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid

Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid for Grade 11 2024 is part of Chemistry for Grade 11 (IGCSE) preparation. The Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid questions and answers have been prepared according to the Grade 11 exam syllabus.The Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid MCQs are made for Grade 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid below.
Solutions of Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid questions in English are available as part of our Chemistry for Grade 11 (IGCSE) for Grade 11 & Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid solutions in Hindi for Chemistry for Grade 11 (IGCSE) course. Download more important topics, notes, lectures and mock test series for Grade 11 Exam by signing up for free. Attempt Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid | 15 questions in 15 minutes | Mock test for Grade 11 preparation | Free important questions MCQ to study Chemistry for Grade 11 (IGCSE) for Grade 11 Exam | Download free PDF with solutions
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 1
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What type of compounds can undergo electrolysis when an electric current flows through them?

Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 1
Ionic compounds are capable of undergoing electrolysis when an electric current passes through them. This is because ionic compounds can dissociate into ions in molten form or when dissolved in a solution, allowing the movement of ions to carry the electrical charge. This process leads to the decomposition of the compound into its constituent elements.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 2
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Which electrode in an electrolytic cell attracts positively charged ions?

Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 2
In an electrolytic cell, the anode is the electrode that attracts negatively charged ions (anions). This is because anions are attracted to the positive electrode (anode) during electrolysis, while cations are attracted to the negative electrode (cathode). Therefore, the anode is where oxidation reactions typically occur.
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Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 3
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What is the function of the cathode in an electrolytic cell?

Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 3
The cathode in an electrolytic cell is the electrode that attracts positively charged ions (cations). When the cations reach the cathode, they can gain electrons and undergo reduction reactions, leading to the formation of new substances or the deposition of metals, depending on the specific electrolysis process.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 4
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What happens at the cathode when metals and hydrogen ions become positively charged ions in an electrolytic cell?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 4
When metals and hydrogen ions become positively charged ions at the cathode in an electrolytic cell, they undergo reduction reactions. This process leads to the formation of either a metal or hydrogen gas at the cathode, depending on the specific ions involved. Reduction at the cathode involves the gain of electrons, resulting in the production of new substances in the electrolysis process.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 5
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During electrolysis, where do positive ions, or cations, migrate to acquire electrons?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 5
Positive ions, known as cations, within the electrolyte migrate towards the cathode during electrolysis to acquire electrons. This movement is essential for the charge transfer process to occur effectively. In electrolysis, the cathode attracts positively charged ions, which then gain electrons and undergo reduction reactions. The migration of cations towards the cathode is a fundamental aspect of electrolysis, facilitating various chemical changes and reactions in the process.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 6
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What serves as the charge carriers in the external circuit during electrolysis?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 6
Electrons function as the charge carriers in the external circuit during electrolysis. As the electric current flows through the circuit, electrons move from the anode to the cathode, facilitating the transfer of charge and driving various electrochemical reactions. In the external circuit, electrons play a crucial role in conducting electricity and enabling the movement of charge, which is essential for the overall process of electrolysis to occur.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 7
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Where do negative ions, or anions, move within the electrolyte during electrolysis?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 7
Negative ions, or anions, within the electrolyte move towards the anode during electrolysis. At the anode, these anions release electrons as part of oxidation reactions. This movement of anions towards the anode is a key aspect of electrolysis, contributing to the overall flow of charge and the transformation of chemical species in the electrolyte. Understanding the behavior of anions is essential for comprehending the processes that occur during electrolysis.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 8
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What is the role of electrons in the electrolysis process?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 8
Electrons play a crucial role in facilitating charge transfer in the external circuit during electrolysis. As the electric current flows through the circuit, electrons travel from the anode to the cathode, carrying charge and enabling various electrochemical reactions to occur. In the external circuit, electrons act as the primary carriers of charge, moving through the circuit and participating in redox reactions that drive the electrolysis process forward. Understanding the role of electrons is essential for comprehending how charge transfer occurs in electrolysis.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 9
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During the electrolysis of molten lead(II) bromide, what is the product formed at the cathode?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 9
When lead(II) bromide is electrolyzed, at the cathode, positive lead ions move to the negative electrode where they gain electrons. This results in the formation of a grey lead metal which deposits on the surface of the cathode. This process illustrates the principle that in electrolysis, the metal is typically produced at the cathode where reduction occurs.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 10
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During the electrolysis of aqueous sodium chloride, what substance is produced at the anode?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 10
At the anode during the electrolysis of aqueous sodium chloride, chlorine gas is produced. This occurs due to the oxidation of chloride ions, leading to the formation of elemental chlorine. Chlorine has numerous industrial applications, including in the production of PVC, pesticides, and solvents.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 11
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Which electrode material is typically used for the electrolysis of aqueous sodium chloride?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 11
In the electrolysis of aqueous sodium chloride, inert electrodes made from materials like platinum or carbon/graphite are commonly used. These electrodes do not react with the electrolyte solution or the products of electrolysis, ensuring a stable and efficient electrolysis process.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 12
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What is the key role of hydrogen in the manufacturing process of margarine?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 12
Hydrogen plays a crucial role in the manufacturing of margarine by facilitating the hydrogenation of oils. This process involves adding hydrogen to unsaturated fats to convert them into saturated fats, resulting in a semi-solid consistency ideal for margarine production.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 13
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What gas is produced at the negative electrode during the electrolysis of brine?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 13
During the electrolysis of brine, hydrogen gas is produced at the negative electrode. This occurs because hydrogen ions (H⁺) are discharged at the cathode due to their lower reactivity compared to sodium ions. These hydrogen ions accept electrons, leading to the formation of hydrogen gas.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 14
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In the electrolysis of dilute sulfuric acid, what gas is observed at the positive electrode?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 14
Oxygen gas is observed at the positive electrode during the electrolysis of dilute sulfuric acid. This gas is produced as hydroxide ions (OH⁻) are attracted to the anode, lose electrons, and yield oxygen gas along with water. The presence of oxygen gas at the anode can be confirmed by reigniting a glowing splint.
Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 15
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What is the product formed at the positive electrode when dilute sulfuric acid undergoes electrolysis?
Detailed Solution for Test: Electrolysis & Electrolysis of Molten Compounds & Electrolysis of Aqueous Sodium Chloride and Dilute Sulfuric Acid - Question 15
The product formed at the positive electrode during the electrolysis of dilute sulfuric acid is oxygen gas. This occurs when hydroxide ions (OH⁻) are attracted to the anode, lose electrons, and yield oxygen gas along with water. The production of oxygen gas can be confirmed through specific tests like reigniting a glowing splint.
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