NEET UG · Chemistry · Class 12

Electrochemistry: NEET previous year questions

17 questions in ten years of NEET, asked in 10 of 10 years. Here is what this chapter tests and how.

Asked in 10 years: 17; 10 of 10 papers
10-year average: 1.6; a paper · 1.6 since 2024 -0.0
Typical range: 1–2; questions a paper; fewest 1, most 2
Weighted estimate: 1.8; model, recent papers count more · about 7 marks

Typical range (fact)
10-year average (fact)
Weighted estimate (model)

Typical range: questions per paper in the middle eight of the ten papers, leaving out the single highest and lowest year (about the 10th to 90th percentile), each paper scaled to 180 questions. The ten-year average and the range are historical fact. The weighted estimate is a model: each paper's share, with recent papers counting more (half-life three years), and dropped syllabus removed. It is a guide to effort, not a forecast.

What to do

How to spend time on Electrochemistry

Priority

Should do

Among the chapters that took NEET from half to 80% of its questions. How bands are set

Past questions: 17in 10 of 10 papers
Study plan gives it: 14 hover 12 months; 11 h over 6

Study this chapter →Practise →

Ideas asked most often

Full Cell Potential Calculation3×
Degree of Dissociation from Conductivity2×
Faraday's Laws of Electrolysis2×
Gibbs Free Energy and EMF2×

73 of the 82 ideas in Lumi’s map of this chapter have not been asked or touched in ten years. New questions often come from ideas like these, so learn the whole chapter, not just the list above.

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation65%
Recall6%
Concept6%
Application6%
Match the lists6%
Assertion–reason6%
Figure-based6%

Most common asks: numerical (10); identify disproportionating species from potentials (1); predict product at electrode (1).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all NEET chapters: #49; of 80 by weighted estimate
Rank in Chemistry: #13; of 21 chapters
Share of the paper: 0.9%; ten-year average
Busiest year: 2019; 2 questions
Year to year: Steady; varies by about 0.4 questions
Long-run direction: +0.04; questions per paper, per year
Easy questions: 41%; 72% of ideas rated hard
With a figure: 6%; graph, diagram or structure
Study time: 14 h; 11 h on a 6-month plan
Marks per study hour: 0.49; #74 of 80 chapters
Foundation for others: 79%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20171
20181
20192
20202
20212
20222
20232
20242
20251
20262

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation59%
Concept12%
Multi-step12%
Data or graph6%
Recall6%
Application6%

Coverage

How much of the chapter NEET has used

We split the chapter into 82 ideas. In ten years NEET built a question around 6 of them. Most of the chapter has never been asked, which is why learning it whole beats memorising past questions.

Asked as the main idea: 6
Touched on in a question: 3
Never asked: 73

Topics

What repeats, topic by topic

Questions per topic in each year's paper. Topics that come every year are worth learning first.

Nernst Equation · Every year9
1122111
Electrolytic Conductance and Electrolysis · Every year8
221111

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Nernst EquationEvery year	1	1	2	·	·	2	1	1	·	1	9
Electrolytic Conductance and ElectrolysisEvery year	·	·	·	2	2	·	1	1	1	1	8

02+questions in that year’s paper

Drill down

Topic, idea, question

Open a topic to see every idea NEET tested inside it, then open an idea to read the questions. Each row shows its ten papers.

topicAskedShareYears’17’18’19’20’21’22’23’24’25’26

Open9 · 53%53%7/1022
6 ideas inside
- Repeated3 · 33%33%2/102
- Repeated2 · 22%22%2/10
- 1 · 11%11%1/10
- 1 · 11%11%1/10
- 1 · 11%11%1/10
- 1 · 11%11%1/10
Open8 · 47%47%6/1022

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

The exact ideas NEET has asked

Inside the topics, 12 different ideas were tested. These came more than once, or are new since 2024.

Full Cell Potential Calculation3×
predict feasibility from standard potentials
Degree of Dissociation from Conductivity2×
numerical
Faraday's Laws of Electrolysis2×
numerical
Gibbs Free Energy and EMF2×
assertion-reason on electrochemical thermodynamics
Variation of Molar Conductivity with ConcentrationNew1×
numerical
Non-Additivity of E-standard in Half-ReactionsNew1×
numerical
Determining Electron Transfer Number (n)New1×
match list on conversions and faradays

Idea	Times	Usually asked as
Full Cell Potential Calculationpredict feasibility from standard potentials	3	One-line MCQ
Degree of Dissociation from Conductivitynumerical	2	Numerical
Faraday's Laws of Electrolysisnumerical	2	Numerical
Gibbs Free Energy and EMFassertion-reason on electrochemical thermodynamics	2	Assertion–reason
Variation of Molar Conductivity with Concentrationnumerical	1	NumericalNew
Non-Additivity of E-standard in Half-Reactionsnumerical	1	NumericalNew
Determining Electron Transfer Number (n)match list on conversions and faradays	1	Match the listsNew

Every question

Electrochemistry questions, year by year

The opening words of each question as it appeared in the official paper.

NEET 20262 questions

Q56The standard electrode potential (E $^\circ$ ) for the half-cell reaction $\mathrm{Fe^{3+}+e^-\to Fe^{2+}}$ at 298 K is (Given :…Numerical
Q62For a salt XY, which is a strong electrolyte, the plot of $\Lambda_m$ versus $\sqrt{c}$ has a slope of $-90.0$ S cm $^2$ mol $^{-3/2}$ …Numerical

NEET 20251 question

Q61If the molar conductivity ( $\Lambda_m$ ) of a 0.050 mol L $^{-1}$ solution of a monobasic weak acid is 90 S cm $^2$ mol $^{-1}$ , its extent…Numerical

NEET 20242 questions

Q85Match List I with List II. List I (Conversion) | List II (Number of Faraday required) A. 1 mol of H $_2$ O to O $_2$ | I. 3F B. 1 mol of…Match the lists
Q100Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100 seconds is:…Numerical

NEET 20232 questions

Q76Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : In equation…Assertion–reason
Q79The conductivity of centimolar solution of KCl at 25°C is 0.0210 ohm $^{-1}$ cm $^{-1}$ and the resistance of the cell containing the…Numerical

NEET 20222 questions

Q53Given below are half cell reactions : $\mathrm{MnO_4^- + 8H^+ + 5e^- \to Mn^{2+} + 4H_2O}$ , $E^\circ_{\mathrm{Mn^{2+}/MnO_4^-}} = -1.510$ …Numerical
Q80At 298 K, the standard electrode potentials of $\mathrm{Cu^{2+}/Cu}$ , $\mathrm{Zn^{2+}/Zn}$ , $\mathrm{Fe^{2+}/Fe}$ and $\mathrm{Ag^+/Ag}$ …One-line MCQ

NEET 20212 questions

Q62The molar conductance of NaCl, HCl and $\mathrm{CH_3COONa}$ at infinite dilution are 126.45, 426.16 and 91.0 S $\mathrm{cm^{2}\ mol^{-1}}$ …Numerical
Q97The molar conductivity of 0.007 M acetic acid is 20 S $\mathrm{cm^{2}\ mol^{-1}}$ . What is the dissociation constant of acetic acid ?…Numerical

NEET 20202 questions

Q99On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be :One-line MCQ
Q106The number of Faradays(F) required to produce 20 g of calcium from molten $\mathrm{CaCl_2}$ (Atomic mass of Ca = 40 g mol $^{-1}$ ) is :Numerical

NEET 20192 questions

Q53For the cell reaction $2Fe^{3+}(aq) + 2I^-(aq) \to 2Fe^{2+}(aq) + I_2(aq)$ $E^\ominus_{cell} = 0.24$ V at 298 K. The standard Gibbs energy…Numerical
Q82For a cell involving one electron $E^\ominus_{cell} = 0.59$ V at 298 K, the equilibrium constant for the cell reaction is : [Given that…Numerical

NEET 20181 question

Q81Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below :…Figure-based · figure

NEET 20171 question

Q63In the electrochemical cell : Zn| $\mathrm{ZnSO_4}$ (0.01 M)|| $\mathrm{CuSO_4}$ (1.0 M)|Cu, the emf of this Daniel cell is $E_1$ . When the…One-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.

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