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Friday, 9 October

NEET UG 2022 · Chemistry · Question 53

NEET 2022 Chemistry, question 53

Question 53 of the NEET 2022 paper (code R1) is a Chemistry question from Electrochemistry. Its idea, Full Cell Potential Calculation, was asked 3 times, in 2017 and 2022, across NEET 2017–2026. The NTA final answer key gives option 2.

Updated 2026-10-08

Q53 · Chemistry

Given below are half cell reactions :

MnO4−+8H++5e−→Mn2++4H2O\mathrm{MnO_4^- + 8H^+ + 5e^- \to Mn^{2+} + 4H_2O},

EMn2+/MnO4−∘=−1.510E^\circ_{\mathrm{Mn^{2+}/MnO_4^-}} = -1.510 V

12O2+2H++2e−→H2O\mathrm{\frac{1}{2}O_2 + 2H^+ + 2e^- \to H_2O},

EO2/H2O∘=+1.223E^\circ_{\mathrm{O_2/H_2O}} = +1.223 V

Will the permanganate ion, MnO4−\mathrm{MnO_4^-} liberate O2\mathrm{O_2} from water in the presence of an acid ?

  1. 1No, because Ecell∘=−2.733E^\circ_{cell} = -2.733 V
  2. 2Yes, because Ecell∘=+0.287E^\circ_{cell} = +0.287 VOfficial answer
  3. 3No, because Ecell∘=−0.287E^\circ_{cell} = -0.287 V
  4. 4Yes, because Ecell∘=+2.733E^\circ_{cell} = +2.733 V

Official answer: option 2 · NTA final answer key

Same idea

Full Cell Potential Calculation, in other papers

NEET asked this idea 3 times, in 2017 and 2022. The other 2 questions below.

  • 2022 Q80At 298 K, the standard electrode potentials of Cu2+/Cu\mathrm{Cu^{2+}/Cu}, Zn2+/Zn\mathrm{Zn^{2+}/Zn}, Fe2+/Fe\mathrm{Fe^{2+}/Fe} and Ag+/Ag\mathrm{Ag^+/Ag}…One-line MCQ · Easy
  • 2017 Q63In the electrochemical cell : Zn|ZnSO4\mathrm{ZnSO_4} (0.01 M)||CuSO4\mathrm{CuSO_4} (1.0 M)|Cu, the emf of this Daniel cell is E1E_1. When the…One-line MCQ · Medium

Full Cell Potential Calculation: 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. Nernst Equation alone had 9.

Chapter analysisStudy this chapterPractise this chapter

Electrochemistry: questions per paper

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