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Saturday, 31 October

JEE Main 2020 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 8 January 2020, Shift 2, Chemistry Q46

Question 46 of 75 in this shift, Chemistry question 21 of 25, Section B.

NaClO3\mathrm{NaClO_3} is used, even in spacecrafts, to produce O2\mathrm{O_2}. The daily consumption of pure O2\mathrm{O_2} by a person is 492 L at 1 atm, 300 K. How much amount of NaClO3\mathrm{NaClO_3}, in grams, is required to produce O2\mathrm{O_2} for the daily consumption of a person at 1 atm, 300 K ? __________. NaClO3(s)+Fe(s)→O2(g)+NaCl(s)+FeO(s)\mathrm{NaClO_3(s) + Fe(s) \rightarrow O_2(g) + NaCl(s) + FeO(s)} R=0.082 L atm mol−1 K−1R = 0.082\ \mathrm{L\ atm\ mol^{-1}\ K^{-1}}

Official answer

2120.00 to 2140.00

NTA final key (Jan 2020). Any value in the range scored.

Chapter
Some Basic Concepts of Chemistry
Topic
Stoichiometry
Idea tested
Mass-Mass Stoichiometry

Same idea in other shifts

Asked 3× in all
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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.