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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceOtherMediumConceptual

JEE Main 6 April 2026, Shift 2, Chemistry Q57

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

For a general redox reaction Anode : Red1→Ox1n1++n1e−\mathrm{Red_1\rightarrow Ox_1^{n_1+}+n_1e^-} Cathode : Ox2+n2e−→Red2n2−\mathrm{Ox_2+n_2e^-\rightarrow Red_2^{n_2-}} Which of the following statement is incorrect ?

The figure, in words

Option 3 contains a graph of (E - E°)/(RT/F) against log10 Q with three straight lines through the origin labelled n=1, n=2, n=3 and slope proportional to 1/n.
  1. (1)The overall reaction can be written as n2Red1+n1Ox2⇌n2Ox1n1++n1Red2n2−\mathrm{n_2Red_1+n_1Ox_2\rightleftharpoons n_2Ox_1^{n_1+}+n_1Red_2^{n_2-}}
  2. (2)The electrons do not appear in the overall reaction because electrons produced at the anode are consumed at the cathode.
  3. (3)[figure: plot of (E−E∘)/(RT/F)(E-E^\circ)/(RT/F) (y-axis, -4 to 4) versus log⁡10Q\log_{10}Q (x-axis, -4 to 4); three straight lines through (0, 0) labelled n=1, n=2, n=3, slope ∝1/n\propto 1/n (steepest for n=1)] Here n is the number of electrons transferred in redox reaction.
  4. (4)If the reaction is carried out reversibly, the electrical work done is equal to the ratio of charge and potential difference through which charge is moved.Official answer

Official answer

Option 4

NTA final key.

Chapter
Electrochemistry
Topic
Nernst Equation
Idea tested
Maximum Non-Expansion Work

Same topic in other shifts

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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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.