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Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 31 January 2024, Shift 2, Chemistry Q65

Question 65 of 90 in this shift, Chemistry question 5 of 30, Section A.

Given below are two statements : Statement I : S8\mathrm{S_8} solid undergoes disproportionation reaction under alkaline conditions to form S2−\mathrm{S^{2-}} and S2O32−\mathrm{S_2O_3^{2-}}. Statement II : ClO4−\mathrm{ClO_4^-} can undergo disproportionation reaction under acidic condition. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both statement I and statement II are correct
  2. (2)Both statement I and statement II are incorrect
  3. (3)Statement I is correct but statement II is incorrectOfficial answer
  4. (4)Statement I is incorrect but statement II is correct

Official answer

Option 3

NTA final key.

Chapter
Redox Reactions
Topic
Redox Reactions
Idea tested
Disproportionation Balancing

Same idea in other shifts

Asked 7× in all
  1. 6 Apr 2024, Shift 2 · Q64Match List - I with List - II. List - I (Reaction) (A) N2(g)+O2(g)→2NO(g)\mathrm{N_{2(g)}+O_{2(g)}\rightarrow 2NO_{(g)}} (B)…EasyMatch the list
  2. 1 Feb 2024, Shift 1 · Q68Which of the following reactions are disproportionation reactions ? (A) Cu+→Cu2++Cu\mathrm{Cu^+ \rightarrow Cu^{2+} + Cu} (B)…MediumOther
  3. 29 Jan 2024, Shift 1 · Q63Chlorine undergoes disproportionation in alkaline medium as shown below :…EasySingle correct
  4. 26 Jul 2022, Shift 1 · Q68Which of the given reactions is not an example of disproportionation reaction ?EasySingle correct
  5. 26 Jun 2022, Shift 2 · Q68Which one of the following is an example of disproportionation reaction ?MediumSingle correct
  6. 31 Aug 2021, Shift 2 · Q38In which one of the following sets all species show disproportionation reaction ?MediumSingle 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.