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Saturday, 31 October

JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 2 April 2026, Shift 1, Chemistry Q57

Question 57 of 75 in this shift, Chemistry question 7 of 25, Section A.

An electrochemical cell is constructed using half cells in the direction of spontaneous change Fe(OH)2(s)+2e−→Fe(s)+2OH−(aq)\mathrm{Fe(OH)_2(s)+2e^-\rightarrow Fe(s)+2OH^-(aq)} Eθ=−0.88E^\theta=-0.88 V and AgBr(s)+e−→Ag(s)+Br−(aq)\mathrm{AgBr(s)+e^-\rightarrow Ag(s)+Br^-(aq)} Eθ=+0.07E^\theta=+0.07 V Which of the following option is correct ?
  1. (1)Overall reaction Fe(s)+2OH−(aq)+2AgBr(s)⇌Fe(OH)2(s)+2Ag(s)+2Br−(aq)\mathrm{Fe(s)+2OH^-(aq)+2AgBr(s)\rightleftharpoons Fe(OH)_2(s)+2Ag(s)+2Br^-(aq)}Official answer
  2. (2)Ecellθ=−0.95E^\theta_{cell}=-0.95 V
  3. (3)Fe is reduced in the electrochemical cell
  4. (4)EcellθE^\theta_{cell} is an extensive property

Official answer

Option 1

NTA final key.

Chapter
Electrochemistry
Topic
Nernst Equation
Idea tested
Standard Cell Potential

Same idea in other shifts

Asked 13× in all
  1. 3 Apr 2025, Shift 2 · Q56The standard cell potential (Ecell⊖\mathrm{E^{\ominus}_{cell}}) of a fuel cell based on the oxidation of methanol in air that has been used to…MediumSingle correct
  2. 5 Apr 2024, Shift 2 · Q64For the electro chemical cell M∣M2+∣∣X∣X2−\mathrm{M|M^{2+}||X|X^{2-}} If E(M2+/M)0=0.46 V\mathrm{E^0_{(M^{2+}/M)}} = 0.46\ \mathrm{V} and…MediumSingle correct
  3. 9 Apr 2024, Shift 1 · Q85The standard reduction potentials at 298 K for the following half cells are given below :…MediumNumerical value
  4. 30 Jan 2024, Shift 2 · Q65Reduction potential of ions are given below: ClO4−\mathrm{ClO_4^-} E∘=1.19 VE^\circ = 1.19\ V; IO4−\mathrm{IO_4^-} E∘=1.65 VE^\circ = 1.65\ V;…EasySingle correct
  5. 6 Apr 2023, Shift 2 · Q86The standard reduction potentials at 298 K for the following half cells are given below:…MediumNumerical value
  6. 11 Apr 2023, Shift 2 · Q86The number of correct statements from the following is _______ A. Ecell\mathrm{E_{cell}} is an intensive parameter B. A negative…MediumNumerical value
  7. 28 Jul 2022, Shift 1 · Q70Which of the following has least tendency to liberate H2\mathrm{H_2} from mineral acids ?EasySingle correct
  8. 30 Jul 2022, Shift 2 · Q39The Eo\mathrm{E^o} (volt) values are : Al3+/Al\mathrm{Al^{3+}/Al}, −1.66-1.66, Sc3+/Sc\mathrm{Sc^{3+}/Sc}, −2.08-2.08, Fe3+/Fe2+\mathrm{Fe^{3+}/Fe^{2+}},…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.