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Saturday, 10 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 6 April 2023, Shift 1, Chemistry Q87

Question 87 of 90 in this shift, Chemistry question 27 of 30, Section B.

For the adsorption of hydrogen on platinum, the activation energy is 30 kJ mol−1^{-1} and for the adsorption of hydrogen on nickel, the activation energy is 41.4 kJ mol−1^{-1}. The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at 300 K is ________ (Nearest integer) Given: ln 10 = 2.3 R=8.3R = 8.3 J K−1^{-1} mol−1^{-1}

Official answer

2

NTA final key.

Chapter
Surface Chemistry
Topic
Arrhenius Equation
Idea tested
Activation Energy Calculation

Same idea in other shifts

Asked 2× in all
  1. 24 Jun 2022, Shift 1 · Q85The rate constants for decomposition of acetaldehyde have been measured over the temperature range 700−1000700-1000 K. The data has been…EasyNumerical valueHas a figure

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.