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Redox Reactions And Electrochemistry Important Questions for NEET Chemistry - 2026

Q: 1. What are the most important types of NEET questions asked from Redox Reactions and Electrochemistry?

Most NEET questions on this chapter are MCQs, numericals based on Nernst equation, assertion-reason types, and statement-based questions. Concept application is common, so practice calculating oxidation numbers, balancing redox reactions, cell EMF, and understanding standard electrode potentials. Prioritize numericals and process questions for maximum confidence in exams.

Q: 2. How do I quickly identify the oxidation number for an element in a compound for important NEET questions?

Start by applying basic oxidation number rules (elements in pure form = 0, oxygen = -2, hydrogen = +1, etc.). For complex ions, set up an equation where the sum of oxidation numbers equals the charge on the ion. Practice with tricky examples—this builds speed and avoids mistakes.

Q: 6. What common mistakes should I avoid while solving NEET MCQs from Electrochemistry?

Common errors include:Confusing anode/cathode reactions in galvanic vs. electrolytic cellsWrong calculation of cell potential directionForgetting to convert units (e.g., moles, coulombs, volt)Read every option and data carefully in numericals.

Q: 7. How can I practice statement-based and match-type NEET questions from Redox Reactions and Electrochemistry?

Use previous year NEET patterns to get familiar with match the following and statement-based questions. Make short notes on types of redox reactions, electrode types, and important formulas, then practice matching properties or processes to terms or reactions. Quizzes and self-made flashcards help.

Practice Redox Reactions And Electrochemistry Important Questions - Free PDF Download

Prepare for NEET Chemistry with the chapter Redox Reactions and Electrochemistry. This topic is important for scoring well in the NEET exam. Vedantu’s NEET Important Questions with Answers will help you understand every concept easily.

This chapter includes electronic concepts of oxidation and reduction, rules for assigning oxidation number, and redox balancing. You will also study electrolytic and metallic conduction, conductance in solutions, and applications of Kohlrausch’s law. Key areas include electrochemical cells, types of electrodes, standard electrode potentials, cell reactions, and the Nernst equation.

Practicing with these important questions covers all crucial points for the NEET exam. Each question comes with a clear answer for easy learning. Download the free NEET Important Questions PDF from Vedantu and start your preparation today.

Practice Redox Reactions And Electrochemistry Important Questions - Free PDF Download

1. Multiple choice questions.

1. In the reaction Zn + CuSO₄ → ZnSO₄ + Cu, which species is oxidized?

(a) Zn
(b) CuSO₄
(c) ZnSO₄
(d) Cu

Answer: (a) Zn

2. The oxidation number of sulphur in Na₂S₂O₃ is:

(a) +2 and +6
(b) +2 and +4
(c) +6 and 0
(d) +5 and -1

Answer: (b) +2 and +6

3. Which of the following solutions will have highest molar conductivity at infinite dilution?

(a) KCl
(b) LiCl
(c) NaCl
(d) CsCl

Answer: (d) CsCl

4. The Nernst equation is used to calculate:

(a) Standard temperature
(b) Cell potential under non-standard conditions
(c) Ionic product
(d) Molar conductance

Answer: (b) Cell potential under non-standard conditions

5. In a galvanic cell, electrons flow from:

(a) Anode to cathode externally
(b) Cathode to anode externally
(c) Salt bridge to electrodes
(d) Both electrodes to electrolyte

Answer: (a) Anode to cathode externally

2. Very Short Answer (VSA).

1. Define oxidation in terms of electronic concept.

Answer: Oxidation is the process where an atom or ion loses electrons, resulting in an increase in its oxidation number.

2. What is the oxidation number of Cl in KClO₃?

Answer: The oxidation number of chlorine in KClO₃ is +5.

3. Name the electrode at which reduction occurs in a galvanic cell.

Answer: In a galvanic cell, reduction occurs at the cathode.

4. State Kohlrausch’s law briefly.

Answer: Kohlrausch’s law states that at infinite dilution, each ion contributes independently to the total molar conductivity.

5. Write the Nernst equation for the cell: Zn(s) | Zn²⁺(aq) || Cu²⁺(aq) | Cu(s).

Answer: $E_{cell} = E^\circ_{cell} - \frac{0.0591}{2} \log\left(\frac{[Zn^{2+}]}{[Cu^{2+}]}\right)$

3. Short Answer Questions.

1. Explain the steps to balance the redox reaction: Fe²⁺ + Cr₂O₇^2- + H⁺ → Fe³⁺ + Cr³⁺ + H₂O by ion-electron method.

Answer:

Write oxidation and reduction half-reactions separately.
Balance atoms except H and O; then balance O by adding H₂O and H by adding H⁺.
Balance charges by adding electrons. Equalize electrons in both halves and add the equations.

2. How does the cell potential of a Galvanic cell change with concentration according to Nernst equation?

Answer: As per the Nernst equation, cell potential decreases if the concentration of products increases or reactants decrease. This is because the logarithmic term becomes positive, reducing the overall $E_{cell}$ value for non-standard concentrations.

3. Explain why conductance of an electrolyte increases with dilution.

Answer: On dilution, the number of free ions per unit volume increases as the ions move farther apart and face less interionic attraction, thus their mobility increases. Hence, both specific and molar conductance rise with dilution for electrolytes.

4. How is Gibbs' free energy related to cell potential? Give the relation.

Answer: The change in Gibbs' free energy ($\Delta G$) for an electrochemical cell is given by $\Delta G = -n F E_{cell}$, where $n$ = number of electrons, $F$ = Faraday’s constant, and $E_{cell}$ = cell potential.

5. Compare the working of dry cell and fuel cell (one key difference).

Answer: A dry cell converts chemical energy to electrical energy using a zinc anode and a carbon cathode, while a fuel cell generates electricity from continuous supply of fuel (like H₂) and oxygen, producing products like water.

4. True or False Questions.

1. In metallic conduction, current is carried by movement of ions.

Answer: False

2. The sum of oxidation numbers of all atoms in a neutral compound is zero.

Answer: True

3. Electrolytic conduction occurs in solution only when ions are present.

Answer: True

4. Nernst equation is not applicable to half-cells involving gases.

Answer: False

5. Fuel cells are more eco-friendly compared to conventional cells.

Answer: True

3. Fill in the Blanks Questions.

1. In redox reactions, the substance which gains electrons is called ________.

Answer: oxidizing agent

2. The standard electrode potential of hydrogen electrode is assigned a value of ________ volt.

Answer: zero (0)

3. The total number of electrolytes in a cell that contribute to conductance is called ________.

Answer: ionic strength

4. The device that maintains electrical neutrality by allowing ions to flow between half-cells is called ________.

Answer: salt bridge

5. The product of charge and number of moles of electrons is called ________.

Answer: Faraday (F)

Why Redox Reactions and Electrochemistry are Vital for NEET Chemistry

Mastering Redox Reactions and Electrochemistry gives you a strong foundation for NEET Chemistry. These topics help you solve practical problems, understand oxidation number rules, and interpret real-world applications like batteries and cells—crucial for scoring well in the exam.

Many questions in NEET test your knowledge of cell potential, Nernst equation, and Kohlrausch’s law. With clear practice, you can confidently answer numerical, conceptual, and assertion-type questions from this chapter. This boosts your overall Chemistry performance in NEET.

Prepare these important questions with Vedantu for NEET 2026 to strengthen your concepts on electrolytic and metallic conduction, half-cell reactions, and relationship between energy and cell potential. Consistent revision keeps you ready for all twists in NEET Chemistry questions.

FAQs on Redox Reactions And Electrochemistry Important Questions for NEET Chemistry - 2026

1. What are the most important types of NEET questions asked from Redox Reactions and Electrochemistry?

Most NEET questions on this chapter are MCQs, numericals based on Nernst equation, assertion-reason types, and statement-based questions. Concept application is common, so practice calculating oxidation numbers, balancing redox reactions, cell EMF, and understanding standard electrode potentials. Prioritize numericals and process questions for maximum confidence in exams.

2. How do I quickly identify the oxidation number for an element in a compound for important NEET questions?

Start by applying basic oxidation number rules (elements in pure form = 0, oxygen = -2, hydrogen = +1, etc.). For complex ions, set up an equation where the sum of oxidation numbers equals the charge on the ion. Practice with tricky examples—this builds speed and avoids mistakes.

4. What steps can I follow to balance redox reactions in NEET practice questions?

Balancing redox reactions can be tackled in a few systematic steps:

Write separate oxidation and reduction half-reactions.
Balance atoms other than O and H.
Balance O using H₂O, H using H⁺.
Balance charges by adding electrons.
Combine half-reactions to cancel electrons.

5. How are assertion-reason questions from this chapter usually framed in NEET exams?

These questions test if students understand cause-effect in redox processes and electrochemical principles. Usually, one statement asserts a fact, and the second gives a reason (e.g., "Standard electrode potential is positive because..."), and you must decide if both are true and if the reason correctly explains the assertion.

6. What common mistakes should I avoid while solving NEET MCQs from Electrochemistry?

Common errors include:

Confusing anode/cathode reactions in galvanic vs. electrolytic cells
Wrong calculation of cell potential direction
Forgetting to convert units (e.g., moles, coulombs, volt)

Read every option and data carefully in numericals.

7. How can I practice statement-based and match-type NEET questions from Redox Reactions and Electrochemistry?

Use previous year NEET patterns to get familiar with match the following and statement-based questions. Make short notes on types of redox reactions, electrode types, and important formulas, then practice matching properties or processes to terms or reactions. Quizzes and self-made flashcards help.