Learn

Saturday, 31 October

JEE Main 2021 · ChemistryNumerical answerNumerical valueMediumData or graph

JEE Main 25 February 2021, Shift 1, Chemistry Q56

Question 56 of 90 in this shift, Chemistry question 26 of 30, Section B.

For 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 given below : The temperature at which the rate constant of the reaction is 10−410^{-4} s−1^{-1} is ________ K. (Rounded-off to the nearest integer) [Given : The rate constant of the reaction is 10−510^{-5} s−1^{-1} at 500 K.]

The figure, in words

Graph with vertical axis labelled log k (arrow upward) and horizontal axis labelled 1/T (arrow to the right). A straight line starts high on the vertical axis and slopes downward to the right, labelled 'slope = -10000 K'. No numeric tick values.

Official answer

526

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. 28 Jul 2022, Shift 2 · Q58For 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…EasyNumerical 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.