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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 27 June 2022, Shift 2, Chemistry Q80

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

Match List I with List II. List I (Anion) | List II (gas evolved on reaction with dil.H2SO4\mathrm{H_2SO_4}) A. CO32−\mathrm{CO_3^{2-}} | I. Colourless gas which turns lead acetate paper black. B. S2−\mathrm{S^{2-}} | II. Colourless gas which turns acidified potassium dichromate solution green. C. SO32−\mathrm{SO_3^{2-}} | III. Brown fumes which turns acidified KI solution containing starch blue. D. NO2−\mathrm{NO_2^{-}} | IV. Colourless gas evolved with brisk effervescence, which turns lime water milky. Choose the correct answer from the options given below:
  1. (1)A-III, B-I, C-II, D-IV
  2. (2)A-II, B-I, C-IV, D-III
  3. (3)A-IV, B-I, C-III, D-II
  4. (4)A-IV, B-I, C-II, D-IIIOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Practical Chemistry (Qualitative Analysis)
Topic
Anion Analysis
Idea tested
Dilute Acid Group Identification

Same topic in other shifts

All Anion Analysis questions
  1. 5 Apr 2026, Shift 2 · Q70A paper dipped in a dil. H2SO4\mathrm{H_2SO_4} solution of 'X' upon treatment with SO2\mathrm{SO_2} gas turns into green. The compound 'X' is :EasySingle correct
  2. 2 Apr 2025, Shift 2 · Q62Formation of Na4[Fe(CN)5NOS]\mathrm{Na_4[Fe(CN)_5NOS]}, a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate…EasySingle correct
  3. 6 Apr 2024, Shift 2 · Q72During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in…EasySingle correct
  4. 8 Apr 2024, Shift 1 · Q73Match List I with List II LIST I (Compound): A. Fe4[Fe(CN)6]3⋅xH2O\mathrm{Fe_4[Fe(CN)_6]_3\cdot xH_2O}; B. [Fe(CN)5NOS]4−[\mathrm{Fe(CN)_5NOS}]^{4-}; C.…MediumMatch the list
  5. 29 Jan 2024, Shift 1 · Q79In chromyl chloride test for confirmation of Cl−\mathrm{Cl^-} ion, a yellow solution is obtained. Acidification of the solution and…MediumSingle correct
  6. 30 Jan 2024, Shift 1 · Q79Given below are two statements : Statement (I) : The gas liberated on warming a salt with dil H2SO4\mathrm{H_2SO_4}, turns a piece of paper…EasyTwo statements

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.