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For the benefit of CBSE Class 12 Science students, the NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry are provided here. The concepts of Electrochemistry are covered in Chapter 3 of the NCERT Solutions for Class 12 Chemistry. The NCERT Solutions for Class 12 Chemistry is a comprehensive resource that includes answers to all the NCERT Textbook’s exercises. These solutions were created by Infinity Learn topic experts using the most recent term – II CBSE Syllabus for 2024-25 and its guidelines.
Electrochemistry is a branch of chemistry that studies the relationship between chemical and electrical energy created in redox reactions, as well as how they might be changed into one another. The top subject specialists develop the NCERT Solutions for Class 12. In essence, these answers can help students prepare for the second term of Class 12 exams, as well as JEE advanced and other medical admission tests. By downloading the free pdf, students can effectively answer the numerical questions based on electrochemistry.
The ideas covered in this chapter of NCERT Solutions for Class 12 Chemistry are vital not only for the CBSE Term I test but also for competitive exams such as JEE and NEET. Subject experts generate the solutions in accordance with the most recent term – I CBSE Syllabus for Class 12 and its requirements. Students may now access the NCERT Solutions for Class 12 Chemistry Chapter 3 in word format using the link provided below.
NCERT Solutions for Class 12 Chemistry Electrochemistry Chapter 3 PDF Download
Class 12 Chemistry – Electrochemistry Chapter 3 Questions with Answers
Ques. What is the difference between a voltaic cell and an electrolytic cell?
Ans. A voltaic cell generates electricity from a spontaneous redox reaction, while an electrolytic cell uses electricity to drive a non-spontaneous redox reaction. This difference is crucial in understanding the direction of the reaction and the role of the electrodes in the process. Voltaic cells are used to generate electricity from chemical energy, whereas electrolytic cells are used to drive chemical reactions using electricity.
Ques. What is the standard reduction potential of the hydrogen electrode?
Ans. The standard reduction potential of the hydrogen electrode is defined as 0.00 V at 25°C. This is a reference point for measuring the reduction potentials of other half-reactions. The hydrogen electrode is chosen as the reference because it is easy to prepare and maintain, and its reduction potential is well-defined.
Ques. Explain the term “electrochemical series” and its significance.
Ans. The electrochemical series is a list of elements arranged in decreasing order of their standard reduction potentials. This series helps predict the direction of spontaneous redox reactions and the strength of reducing and oxidizing agents. It is significant because it allows us to predict whether a reaction will occur spontaneously and which substance will be oxidized or reduced.
Ques. What is the relationship between the Gibbs free energy change (ΔG) and the cell potential (E°cell) for a spontaneous redox reaction?
Ans. ΔG = -nFE°cell, where n is the number of electrons transferred and F is the Faraday constant. This equation shows that the Gibbs free energy change is directly proportional to the cell potential. A higher cell potential indicates a more spontaneous reaction, which is associated with a more negative Gibbs free energy change.
Ques. How is the equilibrium constant (K) related to the cell potential (E°cell) for a spontaneous redox reaction?
Ans. ln K = -nFE°cell / RT, where R is the universal gas constant and T is the absolute temperature. This equation shows that the equilibrium constant is inversely proportional to the cell potential. A higher cell potential indicates a lower equilibrium constant, which means the reaction is more spontaneous.
Ques. What is the Nernst equation, and how is it used to calculate the cell potential under non-standard conditions?
Ans. E = E°cell – (RT/nF) ln Q, where Q is the reaction quotient. The Nernst equation is used to calculate the cell potential when the reaction conditions are not at standard conditions (i.e., when the concentrations of reactants and products are not at their standard values). It allows us to predict the cell potential under various conditions, which is important in understanding the behavior of electrochemical cells.
Ques. Explain the concept of pH and its importance in electrochemical reactions.
Ans. pH is a measure of the hydrogen ion concentration in a solution. It affects the reduction potentials of half-reactions and the overall cell potential. This is because the reduction potential of a half-reaction depends on the concentration of hydrogen ions, which is influenced by the pH of the solution. Understanding pH is crucial in electrochemical reactions because it can affect the direction and rate of the reaction.
Ques. What is the relationship between the standard reduction potentials of two half-reactions and the equilibrium constant for the overall reaction?
Ans. K = exp(nFΔE°/RT), where ΔE° is the difference between the standard reduction potentials of the two half-reactions. This equation shows that the equilibrium constant is related to the difference in standard reduction potentials between the two half-reactions. This relationship is important in understanding the direction and rate of redox reactions.
Ques. How can you determine the direction of a spontaneous redox reaction using the electrochemical series?
Ans. The reaction will be spontaneous if the reducing agent has a higher reduction potential than the oxidizing agent. This is because the reducing agent is more likely to lose electrons and the oxidizing agent is more likely to gain electrons. The electrochemical series helps us predict which substance will be oxidized or reduced and whether the reaction will occur spontaneously.
Ques. What is the significance of the salt bridge in an electrochemical cell?
Ans. The salt bridge completes the circuit and maintains electrical neutrality in the half-cells by allowing the flow of ions. It prevents the buildup of charge in the half-cells and ensures that the reaction occurs at a constant rate. The salt bridge is crucial in maintaining the integrity of the electrochemical cell and ensuring that the reaction occurs efficiently.
Ques. Explain the concept of corrosion and its prevention using electrochemical principles.
Ans. Corrosion is the deterioration of metals due to redox reactions with the environment. It can be prevented by cathodic protection, using sacrificial anodes, or applying protective coatings. Cathodic protection involves applying a negative potential to the metal to prevent oxidation, while sacrificial anodes involve using a more reactive metal to protect the main metal. Protective coatings can prevent the reaction between the metal and the environment.
Ques. How can you determine the standard cell potential for a redox reaction using the Nernst equation?
Ans. Set Q = 1 and substitute the standard reduction potentials of the half-reactions into the Nernst equation. This method allows us to calculate the standard cell potential for a redox reaction by using the standard reduction potentials of the half-reactions and the Nernst equation.
Ques. What is the relationship between the cell potential and the equilibrium constant for a redox reaction?
Ans. E°cell = -(RT/nF) ln K. This equation shows that the cell potential is inversely proportional to the equilibrium constant. A higher cell potential indicates a lower equilibrium constant, which means the reaction is more spontaneous.
Ques. Explain the concept of overvoltage and its significance in electrochemical processes.
Ans. Overvoltage is the additional potential required to drive an electrochemical reaction at a desired rate. It affects the efficiency and selectivity of electrolytic processes. Overvoltage is significant because it can influence the rate of reaction, the amount of product formed, and the energy required to drive the reaction.
Ques. How can you determine the number of electrons transferred in a redox reaction using Faraday’s laws of electrolysis?
Ans. The amount of charge passed is proportional to the amount of substance oxidized or reduced, and the constant of proportionality is the Faraday constant. This relationship allows us to determine the number of electrons transferred in a redox reaction by measuring the amount of charge passed and the amount of substance oxidized or reduced.
Benefits of NCERT Solutions Class 12 Chemistry – Chapter 3 Electrochemistry
- Experienced teachers conducted research and wrote the solutions.
- In each chapter, there are new value-based questions with answers.
- Jargon-free and simple language.
- The content has been created in accordance with the CBSE curriculum 2021-22.
- The Coverage of essential ideas is extensive.
- The most useful content for preparing for CBSE board exams.
Subtopics of Class 12 Chemistry Chapter 3 – Electrochemistry
- Electrochemical cells
- Galvanic Cells
- Nernst Equation
- Conductance of Electrolytic solutions
- Electrolytic cells and Electrolysis
- Batteries
- Fuel Cells
- Corrosion
NCERT Solutions for Class 12 Chemistry FAQs
What role does NCERT Class 12 Chemistry Solutions have in exam preparation?
The questions in NCERT textbooks can be a major help in ensuring that you study properly and perform well in exams and assessments. Students can begin Practicing NCERT Solutions Class 12 Chemistry right away, which will result in improved academic achievement in the future. As a result, a firm grasp of the syllabus would be developed.
How can I get NCERT Chemistry Solutions Class 12 Chapter 3 Electrochemistry?
To see the solutions, go to the Infinity Learn website and select NCERT Solutions, then select class 12 and then subject and Chapter. These solutions provided by us cover all the concepts, with detailed explanations.
Do Infinity Learn NCERT Solutions for Class 12 Chemistry have better quality?
NCERT Solutions for Class 12 Chemistry are created by highly experienced topic experts who have extensive experience in the field. They curate the solutions by strictly adhering to the latest CBSE board's syllabus and norms. The questions from the NCERT textbook are addressed comprehensively so that students may understand the ideas quickly.
Does Infinity Learn NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry help students get full marks in their board exams?
Yes, of course, NCERT Solutions for Class 12 Chemistry Chapter 3 Moving Charge and Magnetism is one of the top study materials available on the internet. When students are unable to find a proper response to textbook questions, they can resort to subject-specific and chapter-specific solutions. It also enhances their capacity to respond to complex questions that may appear on board exams. Apart from the board student will also get help in board exams.
List the key ideas covered in Chapter 3 of NCERT Solutions for Class 12 Chemistry?
The main ideas addressed in NCERT Solutions for Class 12 Chemistry Chapter 3 are reproduction in organisms, which is a broad topic that encompasses fertilization and the generation of new individuals. The topic covers both sexual and asexual reproduction in both plants and animals. Asexual reproduction includes a single parent and the fusing of male and female gametes, whereas sexual reproduction involves the fusion of male and female gametes.
