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Friday, 9 October

NEET UG 2021 · Chemistry · Question 97

NEET 2021 Chemistry, question 97

Question 97 of the NEET 2021 paper (code O1) is a Chemistry question from Electrochemistry. Its idea, Degree of Dissociation from Conductivity, was asked twice, in 2021 and 2025, across NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q97 · Chemistry

The molar conductivity of 0.007 M acetic acid is 20 S cm2 mol−1\mathrm{cm^{2}\ mol^{-1}}. What is the dissociation constant of acetic acid ? Choose the correct option.

[ΛH+∘=350\Lambda^{\circ}_{H^{+}} = 350 S cm2 mol−1\mathrm{cm^{2}\ mol^{-1}}

ΛCH3COO−∘=50\Lambda^{\circ}_{CH_3COO^{-}} = 50 S cm2 mol−1\mathrm{cm^{2}\ mol^{-1}}]

  1. 11.75×10−51.75\times10^{-5} mol L−1\mathrm{L^{-1}}Official answer
  2. 22.50×10−52.50\times10^{-5} mol L−1\mathrm{L^{-1}}
  3. 31.75×10−41.75\times10^{-4} mol L−1\mathrm{L^{-1}}
  4. 42.50×10−42.50\times10^{-4} mol L−1\mathrm{L^{-1}}

Official answer: option 1 · NTA final answer key

Same idea

Degree of Dissociation from Conductivity, in other papers

NEET asked this idea twice, in 2021 and 2025. The other question below.

  • 2025 Q61If the molar conductivity (Λm\Lambda_m) of a 0.050 mol L−1^{-1} solution of a monobasic weak acid is 90 S cm2^2 mol−1^{-1}, its extent…Numerical · Medium

Degree of Dissociation from Conductivity: every question and how it was framed

The chapter

Electrochemistry in ten years of NEET

17 questions from 2017–2026, asked in 10 of 10 papers, about 1.6 a paper. Electrolytic Conductance and Electrolysis alone had 8.

Chapter analysisStudy this chapterPractise this chapter

Electrochemistry: questions per paper

0241’171’182’192’202’212’222’232’241’252’26