Electrochemistry - NEET Previous Year Questions with Solutions and Weightage

Electrochemistry is one of the important topics in the NEET exam. Their collective weightage is about 6% and 5-6 questions are expected from these topics in the NEET exam 2025.

Specifically from the syllabus which include concepts like Electrochemical cells - Electrolytic and Galvanic cells, different types of electrodes, electrode potentials including standard electrode potential, half - cell and cell reactions, emf of a Galvanic cell and its measurement: Nernst equation and its applications; Relationship between cell potential and Gibbs' energy change: Dry cell and lead accumulator; Fuel cells.

Read More:

Electrochemistry questions with detailed solutions asked in NEET UG 2025 exam are listed below:

Question 1:

The conductivity of the centimolar solution of KCI at 25°C is 0.0210 ohm-1cm-1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of the cell constant is :

• 3.28 cm-1
• 1.26 cm-1
• 3.34 cm-1
• 1.34 cm-1

View Solution

Question 2:

Given below are two statements labeled Assertion A and the labeled as Reason R :

Assertion A: In the equation ΔrG=−nFEcell Δr ,G=−nFE cell value of

ΔrGΔr ,G depends on n.

Reasons R: ECell is an intensive property and ΔrGΔr , G is an extensive property.

In the light of the above statements, choose the correct answer from the options below :

• Both A and R are true and R is the correct explanation of A.
• A is true but R is false.
• A is false but R is true.
• Both A and R are true and R is the correct explanation of A.

View Solution

Question 3:

At 298 K, the standard electrode potentials of Cu2+/Cu, Zn2+/Zn, Fe2+/Fe and Ag+/Ag are 0.34 V, - 0.76 V, - 0.44 V and 0.80 V, respectively.

On the basis of standard electrode potential, predict which of the following reaction cannot occur?

• CuSO4(aq) + Zn(s) → ZnSO4(aq) + Cu(s)
• CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)
• FeSO4(aq) + Zn(s) → ZnSO4(aq) + Fe(s)
• 2CuSO4(aq) + 2Ag(s) → 2Cu(s) + Ag2SO4(aq)

View Solution

Question 4:

Given below are half-cell reactions:

• Yes, because E°cell = +0.287V
• No, because E°cell = -0.287V
• Yes, because E°cell = +2.733 V
• No, because E°cell = -2.733 V

View Solution

Question 5 :

Find the emf of the cell

Ni(s) + 2 Ag+ (0.001 M) → Ni2+ (0.001 M) + 2Ag(s)

• 1.0385 V
• 1.385 V
• 0.9615 V
• 1.05 V

View Solution

Question 6:

On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:

• Hydrogen gas
• Oxygen gas
• H2S
• SO2

View Solution

Question 7:

In which case change in entropy is negative? (1)(2) (3) (4)

• Evaporation of water
• Expansion of a gas at constant temperature
• Sublimation of solid to gas
• 2H(g)→H2(g)

View Solution

Question 8:

For a cell involving one electron ECell = 0.59 V at 298 K, the equilibrium constant for the cell reaction is ;

View Solution

Question 9:

Extraction of gold and silver involves leaching with CN– ion. Silver is later recovered by

• Liquation
• Distillation
• Zone refining
• Displacement with Zn

View Solution

Question 10:

Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

• zinc is lighter than iron
• zinc has lower melting point than iron
• zinc has lower negative electrode potential than iron
• zinc has higher negative electrode potential than iron

View Solution

NEET Chemistry Exam Pattern 2024: Marking Scheme

Candidates will get 4 marks for every correct answer. 1 mark will be deducted for every incorrect answer. No mark will be rewarded for unattempted questions. Candidates are advised not to fill in more than one option in the OMR sheet. If they do so then that question will be considered incorrect and you will get negative marks.

Important Topics for NEET Chemistry

NEET chemistry syllabus can be divided into 3 parts i.e Organic, Inorganic, and Physical Chemistry. The weightage of questions asked from each section is almost the same every year.

• NEET Physical Chemistry: It’s the numerical section of NEET Chemistry.
• NEET Organic Chemistry: From this section, you must focus on memorizing the names of various compounds that constitute reagents, subtracts, etc.
• NEET Inorganic Chemistry: This section is considered the easiest section of NEET Chemistry.

NEET Chemistry Exam Pattern 2024: Chapter wise weightage

Based on the questions asked in previous years we have tabulated the weightage of sections or topics given to class XII and XII:

NEET 2024 Question Paper PDF Code R

NEET 2024 Question Paper PDF Code Q

NEET 2024 Question Paper PDF Code T

NEET 2024 Question Paper PDF Code S

NEET Re-Exam June 23 Question Paper

NEET Subject Wise Question Paper 2024 PDF with Answer Key and Solution

NEET Sample Paper 2024 PDF Download with Answer

Students must not confuse this sample paper with the actual question paper. This is just a mock paper with answers that will help you with your exam preparation.

NEET 2025: Previous Year Question Papers

Given below are the year-wise question paper for NEET examination:

Frequently Asked Questions:

Q1. What is electrochemistry, and why is it important?

Electrochemistry is a branch of chemistry that studies the generation of electricity by the process of spontaneous chemical reactions. It also deals with the applications of electrical energy to non-spontaneous chemical reactions.

• Electrochemistry is the study of the movement of electrons in oxidation and reduction reactions.
• The reaction is carried out at a polarized electrode surface.
• Each electronic plate is oxidized or reduced at a particular potential difference.
• It is used to examine the phenomena resulting from combined chemical and electrical effects..
• Batteries used in flashlights and the use of calculators are some examples of electrochemistry.

Read More:

Electrochemistry, a crucial topic for NEET, studies the relationship between chemical reactions and electricity, focusing on how chemical energy converts to electrical energy (and vice versa) through electron transfer. It's important because it explains fundamental processes like battery function, electrolysis, and corrosion, with wide applications in various fields.

Q2. What is the significance of the Nernst equation in NEET numericals?

Nernst equation is important as the concept that explains the relationship between electrode potential and the concentration of electrolyte solution is known as Nernst Equation. Nernst Equation is used to determine the cell potential of an electrochemical cell at a given temperature, pressure and reactant concentration. The cell potential of electrochemical cells can be determined with the help of the Nernst Equation even under non - standard conditions.

Q3. Which common mistakes should I avoid while solving electrochemistry numericals in NEET?

Common mistakes that should be avoided while solving electrochemistry numericals are set in a tricky way. so that to confuse the students, these don't require tough challenging calculations but they are a bit difficult to understand and apply the right formula to it. Since it's a Competitive exam, the questions will never be easy.

The advice will be to be thorough with basic concepts and formulas for numericals and manage time wisely. Don't waste more than a minute to solve each numerical question, just study well.

Q4. How can I quickly balance redox reactions in electrochemical calculations?

Redox Reactions are defined as those reactions in which oxidation and reduction occur simultaneously. Redox Reactions are accompanied by change of energy in the form of heat, light, or electricity.

• The term redox, refers to the process of “Reduction and Oxidation”. In a Redox reaction, substances that gain electrons which reduce them to a low valency state are known as oxidising agents whereas substances that lose electrons thereby oxidizing to a higher valency state are called reducing agents.
• NEET Syllabus is divided broadly into topics from Class 11th and Class 12th. Redox Reactions forms part of Class 11 Chemistry Syllabus. Redox Reaction is a unit of Physical Chemistry that has an overall weightage of around 32% in the chemistry section of NEET 2022

Quick Links:

NEET 2022 Important Topics from Redox Reactions

Q5. What is the best strategy to revise Electrochemistry for NEET in one day?

The best strategy to revise Electrochemistry for NEET is through :

Electrochemistry: Important Questions

Electrochemistry: Types, Electrolysis & Important Terms

NEET Study Notes for Electrochemistry

Things to Remember

• Electrochemistry is the branch of chemistry that studies the relationship between electric potential differences.
• It also checks for the changes that take place in the chemical reactions.
• Galvanization protects the iron from rusting.
• Redox reaction takes place with the help of external voltage.
• Conductance is defined as the process by which electric current passes through the conductor.