Cbse Class 12 Chemistry Chapter 3 Ncert Solutions
CBSE NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry PDF – Electrochemistry plays an important role in CBSE Class 12. Students who are thorough with NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry can easily score good marks in their board exams. On this page, we have provided NCERT Solutions for Class 12 Chemistry Chapter 3 – Electrochemistry.
All the questions provided on this page are solved by our top experts of Embibe. Each and every question comes with a detailed step-by-step solution along with diagrammatic explanations. So candidates can download the Electrochemistry NCERT Solutions to study in offline mode as well. Read on to find out everything about CBSE NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry.
PRACTICE CLASS 12 ELECTROCHEMISTRY QUESTIONS
Latest Update
👉 The CBSE Term 1 board exams for major subjects will commence for Class 10 students from November 30 to December 11, 2021, and for Class 12 students from December 1 to December 22, 2021.
👉 Regular students can collect their admit cards from their respective schools, and private candidates can download the admit card from the official website of CBSE – cbse.gov.in.
👉 The exam duration for each subject is 90 minutes.
👉 The CBSE Term 1 board exam will be conducted entirely offline, and there is no option for students to appear online.
👉 Since the CBSE Term 1 exam will be held in the winter season, the exams will commence from 11:30 A.M instead of 10:30 A.M. The correct answer for each choice must be written on the OMR sheets, which can only be written using a blue or black ink pen.
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CBSE NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry PDF Download
Students can also download the NCERT Solutions for Class 12 Chemistry in PDF format to study in offline mode as well. With the help of this NCERT Solutions candidates will not only be able to prepare for their board exams but also helps to crack the competitive engineering and medical entrance exams.
DOWNLOAD CBSE CLASS 12 CHEMISTRY CHAPTER 3 NCERT SOLUTIONS PDF
Electrochemistry Important Questions
Long Answer Questions
- Answer the following questions.
- (i) Cell 'A' has ECell = 2V and Cell 'B' has ECell = 1.1V which of the two cells 'A' or 'B' will act as an electrolytic cell. Which electrode reactions will occur in this cell?
- (ii) If cell 'A' has ECell = 0.5V and cell 'B' has ECell = 1.1V then what will be the reactions at anode and cathode?
- (ii) Is silver plate the anode or cathode?
- (iii) What will happen if salt bridge is removed?
- (iv) When will the cell stop functioning?
- (v) How will concentration of Zn2+ ions and Ag+ ions be affected when the cell functions?
- (vi) How will the concentration of Zn2+ ions and Ag+ ions be affected after the cell becomes 'dead'?
Short Answer Type Questions
- Can absolute electrode potential of an electrode be measured?
- Under what condition is ECell = 0 or Δr G = 0?
- Aqueous copper sulphate solution and aqueous silver nitrate solution are electrolysed by 1 ampere current for 10 minutes in separate electrolytic cells. Will the mass of copper and silver deposited on the cathode be same or different? Explain your answer.
- Depict the galvanic cell in which the cell reaction is Cu + 2Ag+ → 2Ag + Cu2+
- Value of standard electrode potential for the oxidation of Cl– ions is more positive than that of water, even then in the electrolysis of aqueous sodium chloride, why is Cl– oxidised at anode instead of water?
- What is electrode potential?
- Consider the following diagram in which an electrochemical cell is coupled to an electrolytic cell. What will be the polarity of electrodes 'A' and 'B' in the electrolytic cell?
- Why is alternating current used for measuring resistance of an electrolytic solution?
- A galvanic cell has electrical potential of 1.1V. If an opposing potential of 1.1V is applied to this cell, what will happen to the cell reaction and current flowing through the cell?
- How will the pH of brine (aq. NaCl solution) be affected when it is electrolysed?
- Unlike dry cell, the mercury cell has a constant cell potential throughout its useful life. Why?
- Solutions of two electrolytes 'A' and 'B' are diluted. The Λm of 'B' increases 1.5 times while that of A increases 25 times. Which of the two is a strong electrolyte? Justify your answer.
- When acidulated water (dil.H2SO2 solution) is electrolysed, will the pH of the solution be affected? Justify your answer.
- In an aqueous solution how does specific conductivity of electrolytes change with addition of water?
- Which reference electrode is used to measure the electrode potential of other electrodes?
- Consider a cell given below Cu|Cu2+|| Cl2+|Cl2,Pt
Write the reactions that occur at anode and cathode. - Write the Nernst equation for the cell reaction in the Daniel cell. How will the ECell be affected when concentration of Zn2+ ions is increased?
- What advantages do the fuel cells have over primary and secondary batteries?
- Write the cell reaction of a lead storage battery when it is discharged. How does the density of the electrolyte change when the battery is discharged?
- Why on dilution the Λm of CH3COOH increases drastically, while that of CH3COONa increases gradually?
What is the relationship between Gibbs free energy of the cell reaction in a galvanic cell and the emf of the cell? When will the maximum work be obtained from a galvanic cell?
DOWNLOAD CBSE CLASS 12 CHEMISTRY CHAPTER 3 NCERT SOLUTIONS PDF
NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry – Chapter Summary
Electrochemistry is the study of electricity production from chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations. The theoretical and theoretical and practical considerations of this chapter are extremely important. You will also know the types of electrochemical cells.
A galvanic cell will release the chemical energy when a spontaneous redox reaction is converted into electrical work, whereas in an electrolytic cell, electrical energy is used to carry out a non-spontaneous redox reaction. Some of the important concepts such as Gibbs energy and equilibrium constant will be introduced to the students in this chapter.
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The list of topics and sub-topics that will be taught under Electrochemistry Class 12 are tabulated below:
| EX 3.1 | Electrochemical Cells |
| EX 3.2 | Galvanic Cells |
| EX 3.2.1 | Measurement of Electrode Potential |
| Ex 3.3 | Nernst Equation |
| Ex 3.3.1 | Equilibrium Constant from Nernst Equation |
| Ex 3.3.2 | Electrochemical Cell and Gibbs Energy of the Reaction |
| Ex 3.4 | Conductance of Electrolytic Solutions |
| Ex 3.4.1 | Measurement of the Conductivity of Ionic Solutions |
| Ex 3.4.2 | Variation of Conductivity and Molar Conductivity with Concentration |
| Ex 3.5 | Electrolytic Cells and Electrolysis |
| Ex 3.5.1 | Products of Electrolysis |
| Ex.3.6 | Batteries |
| Ex 3.6.1 | Primary Batteries |
| Ex 3.6.2 | Secondary Batteries |
| Ex 3.7 | Fuel Cells |
| Ex 3.8 | Corrosion |
FAQs Related to NCERT Solutions for Class 12 Chemistry Chapter 3
Q1. From where can I download CBSE NCERT Class 12 Chemistry Chapter 3 solutions?
A. You can download the NCERT Solutions for Electrochemistry from Embibe.
Q3. How many exercises are there in NCERT Solutions for Class 12 Chemistry Chapter 3 PDF Download?
A. There are a total of 8 exercises with sub-units.
Q4. What is corrosion 12th chemistry?
A. Corrosion is the term used to describe the process of the surface of metal objects getting covered by oxides (or) other salts of the metal. In corrosion, the metal is oxidised by losing electrons to oxygen, forming oxides. Corrosion is essentially an electrochemical process.
Q5. What is galvanic cell in chemistry?
A. Galvanic cells, also known as voltaic cells, are electrochemical cells in which spontaneous oxidation-reduction reactions produce electrical energy. The reaction may be split into its two half-reactions. Half-reactions separate the oxidation from the reduction, so each can be considered individually.
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Cbse Class 12 Chemistry Chapter 3 Ncert Solutions
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