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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceMatch the listEasyRecall

JEE Main 18 March 2021, Shift 1, Chemistry Q37

Question 37 of 90 in this shift, Chemistry question 7 of 30, Section A.

Match List - I with List - II : List - I (a) Ca(OCl)2\mathrm{Ca(OCl)_2} (b) CaSO4⋅12H2O\mathrm{CaSO_4\cdot\frac{1}{2}H_2O} (c) CaO (d) CaCO3\mathrm{CaCO_3} List - II (i) Antacid (ii) Cement (iii) Bleach (iv) Plaster of Paris Choose the most appropriate answer from the options given below :
  1. (1)(a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)
  2. (2)(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
  3. (3)(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
  4. (4)(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)Official answer

Official answer

Option 4

NTA final key.

Chapter
The s-Block Elements
Topic
s-Block Elements
Idea tested
Gypsum and Plaster of Paris

Same idea in other shifts

Asked 2× in all
  1. 27 Aug 2021, Shift 1 · Q38The number of water molecules in gypsum, dead burnt plaster and plaster of Paris, respectively are :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.