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Friday, 9 October

JEE Main 2023 · ChemistryMultiple choiceOtherMediumConceptual

JEE Main 6 April 2023, Shift 1, Chemistry Q65

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

Which of the following options are correct for the reaction 2 [Au(CN)2]−(aq)+Zn(s)→2 Au(s)+[Zn(CN)4]2−(aq)2\,[\mathrm{Au(CN)_2}]^{-}(aq)+\mathrm{Zn}(s)\rightarrow 2\,\mathrm{Au}(s)+[\mathrm{Zn(CN)_4}]^{2-}(aq) A. Redox reaction B. Displacement reaction C. Decomposition reaction D. Combination reaction Choose the correct answer from the options given below:
  1. (1)A and B onlyOfficial answer
  2. (2)A only
  3. (3)C and D only
  4. (4)A and D only

Official answer

Option 1

NTA final key.

Chapter
Redox Reactions
Topic
Redox Reactions
Idea tested
Identifying Redox Agents

Same idea in other shifts

Asked 2× in all
  1. 2 Apr 2026, Shift 1 · Q61Which of the following sets includes all the species that will change the orange colour of K2Cr2O7\mathrm{K_2Cr_2O_7} in acidic medium ?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 42 of the 174 JEE Main shifts held from 2017 to 2026.