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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 8 January 2020, Shift 2, Chemistry Q33

Question 33 of 75 in this shift, Chemistry question 8 of 25, Section A.

Among the reactions (a) - (d), the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are : (a) CaO+SiO2→CaSiO3\mathrm{CaO + SiO_2 \rightarrow CaSiO_3} (b) 3Fe2O3+CO→2Fe3O4+CO2\mathrm{3Fe_2O_3 + CO \rightarrow 2Fe_3O_4 + CO_2} (c) FeO+SiO2→FeSiO3\mathrm{FeO + SiO_2 \rightarrow FeSiO_3} (d) FeO→Fe+12O2\mathrm{FeO \rightarrow Fe + \frac{1}{2}O_2}
  1. (1)(a)
  2. (2)(d)
  3. (3)(c) and (d)Official answer
  4. (4)(a) and (d)

Official answer

Option 3

NTA final key (Jan 2020).

Chapter
General Principles and Processes of Isolation of Elements
Topic
Metallurgical Extraction
Idea tested
Iron Extraction Chemistry

Same idea in other shifts

Asked 2× in all
  1. 2 Sep 2020, Shift 2 · Q33Cast iron is used for the manufacture 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.