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Saturday, 31 October

JEE Main 2020 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 9 January 2020, Shift 1, Chemistry Q48

Question 48 of 75 in this shift, Chemistry question 23 of 25, Section B.

108 g of silver (molar mass 108 g mol−1\mathrm{mol^{-1}}) is deposited at cathode from AgNO3(aq)\mathrm{AgNO_3(aq)} solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K and 1 bar pressure from water by the same quantity of electricity is ________.

Official answer

5.66 to 5.68

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

Chapter
Electrochemistry
Topic
Faraday's Laws of Electrolysis
Idea tested
Gas Evolution Volume

Same idea in other shifts

Asked 3× in all
  1. 27 Jan 2024, Shift 1 · Q86The mass of silver (Molar mass of Ag : 108 g mol−1108\ \mathrm{g\ mol^{-1}}) displaced by a quantity of electricity which displaces 5600 mL of…EasyNumerical value
  2. 29 Jun 2022, Shift 1 · Q84A dilute solution of sulphuric acid is electrolysed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total…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 108 of the 174 JEE Main shifts held from 2017 to 2026.