JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 24 February 2021, Shift 1, Chemistry Q37

Question 37 of 90 in this shift, Chemistry question 7 of 30, Section A.

The electrode potential of

\mathrm{M^{2+}/M}

of 3d-series elements shows positive value for :

(1)Fe
(2)Co
(3)Zn
(4)CuOfficial answer

Official answer

Option 4

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Standard Electrode Potential Trends

Same idea in other shifts

Asked 5× in all

10 Apr 2023, Shift 1 · Q68Which of the following statements are correct? (A) The $\mathrm{M^{3+}/M^{2+}}$ reduction potential for iron is greater than manganese.…HardSingle correct
25 Jul 2022, Shift 1 · Q87Among $\mathrm{Co^{3+},\ Ti^{2+},\ V^{2+}}$ and $\mathrm{Cr^{2+}}$ ions, one if used as a reagent cannot liberate $\mathrm{H_2}$ from…HardNumerical value
25 Jun 2022, Shift 1 · Q69Among the following, which is the strongest oxidizing agent ?EasySingle correct
27 Jun 2022, Shift 2 · Q68In 3d series, the metal having the highest $\mathrm{M^{2+}/M}$ standard electrode potential isEasySingle 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.