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Friday, 9 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 29 June 2022, Shift 1, Chemistry Q61

Question 61 of 90 in this shift, Chemistry question 1 of 30, Section A.

Production of iron in blast furnace follows the following equation Fe3O4(s)+4CO(g)→3Fe(l)+4CO2(g)\mathrm{Fe_3O_4(s) + 4CO(g) \rightarrow 3Fe(l) + 4CO_2(g)} when 4.640 kg of Fe3O4\mathrm{Fe_3O_4} and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is : [Given : Molar Atomic mass (g mol−1^{-1}) : Fe = 56 Molar Atomic mass (g mol−1^{-1}) : O = 16 Molar Atomic mass (g mol−1^{-1}) : C = 12]
  1. (1)1400
  2. (2)2200
  3. (3)3360Official answer
  4. (4)4200

Official answer

Option 3

NTA final key (2022 Session 1).

Chapter
Some Basic Concepts of Chemistry
Topic
Stoichiometry
Idea tested
Limiting Reagent Identification

Same idea in other shifts

Asked 5× in all
  1. 5 Apr 2026, Shift 2 · Q51What volume of hydrogen gas at STP would be liberated by action of 50 mL of H2SO4\mathrm{H_2SO_4} of 50% purity (density = 1.3 g mL−1^{-1})…MediumSingle correct
  2. 2 Apr 2025, Shift 1 · Q51CaCO3(s)+2HCl(aq)→CaCl2(aq)+CO2(g)+H2O(l)\mathrm{CaCO_3(s)+2HCl(aq)\rightarrow CaCl_2(aq)+CO_2(g)+H_2O(l)} Consider the above reaction, what mass of CaCl2\mathrm{CaCl_2} will be…MediumSingle correct
  3. 7 Apr 2025, Shift 2 · Q71Butane reacts with oxygen to produce carbon dioxide and water following the equation given below.…EasyNumerical value
  4. 16 Mar 2021, Shift 2 · Q51When 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic sulphate solution, ________ ×10−5\times10^{-5} moles of lead…MediumNumerical value

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.