Learn

Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyData or graph

JEE Main 28 July 2022, Shift 2, Chemistry Q58

Question 58 of 90 in this shift, Chemistry question 28 of 30, Section B.

For a reaction, given below is the graph of ln k vs 1T\frac{1}{T}. The activation energy for the reaction is equal to ______ cal mol−1\mathrm{mol^{-1}}. (nearest integer) (Given : R = 2 cal K−1 mol−1\mathrm{K^{-1}\ mol^{-1}})

The figure, in words

Graph of ln k (y-axis, marks at 10 and 20, origin 0.0) versus 1/T (K^-1, x-axis, marks 1 to 5): a straight line falling from ln k = 20 at 1/T = 0 to ln k = 0 at 1/T = 5.

Official answer

8

NTA final key.

Chapter
Chemical Kinetics
Topic
Arrhenius Equation
Idea tested
Log Base 10 Arrhenius Plot Slope

Same idea in other shifts

Asked 4× in all
  1. 4 Apr 2025, Shift 2 · Q55Consider the following plots of log of rate constant k (log k) vs 1T\frac{1}{T} for three different reactions. The correct order of…EasyDiagram basedHas a figure
  2. 25 Feb 2021, Shift 1 · Q56For the reaction, aA+bB→cC+dDa\mathrm{A} + b\mathrm{B} \rightarrow c\mathrm{C} + d\mathrm{D}, the plot of log⁡k\log k vs 1T\frac{1}{\mathrm{T}} is…MediumNumerical valueHas a figure
  3. 8 Jan 2020, Shift 2 · Q27Consider the following plots of rate constant versus 1T\frac{1}{T} for four different reactions. Which of the following orders is correct…MediumDiagram basedHas 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.