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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 11 April 2023, Shift 1, Chemistry Q80

Question 80 of 90 in this shift, Chemistry question 20 of 30, Section A.

When a solution of mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed whereas on treatment with neutral FeCl3\mathrm{FeCl_3}, it gave deep red colour which disppeared on boiling and a brown red ppt was formed. The mixture contains
  1. (1)C2O42−\mathrm{C_2O_4^{2-}} & NO3−\mathrm{NO_3^-}
  2. (2)CH3COO−\mathrm{CH_3COO^-} & NO3−\mathrm{NO_3^-}Official answer
  3. (3)SO32−\mathrm{SO_3^{2-}} & CH3COO−\mathrm{CH_3COO^-}
  4. (4)SO32−\mathrm{SO_3^{2-}} & C2O42−\mathrm{C_2O_4^{2-}}

Official answer

Option 2

NTA final key.

Chapter
Practical Chemistry (Qualitative Analysis)
Topic
Anion Analysis
Idea tested
Acetate Neutral FeCl3 Test

Same idea in other shifts

Asked 2× in all
  1. 30 Jun 2022, Shift 1 · Q80The reagent neutral ferric chloride is used to detect the presence of ___________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.