Learn

Friday, 9 October

JEE Main 2024 · ChemistryNumerical answerNumerical valueEasyMulti-step

JEE Main 9 April 2024, Shift 1, Chemistry Q86

Question 86 of 90 in this shift, Chemistry question 26 of 30, Section B.

Given below are two statements : Statement I : The rate law for the reaction A+B→C\mathrm{A + B \rightarrow C} is rate (r)=k[A]2[B](r) = k[\mathrm{A}]^2[\mathrm{B}]. When the concentration of both A and B is doubled, the reaction rate is increased "xx" times. Statement II : [figure: graph of concentration of R versus time, a straight line falling from [R0][R_0] on the vertical axis, labelled −K-K = Slope] The figure is showing "the variation in concentration against time plot" for a "yy" order reaction. The Value of x+yx + y is ________.

The figure, in words

Graph: concentration of R (vertical axis, starting at [R0]) against time (horizontal axis); straight line with negative slope, labelled -K = Slope.

Official answer

8

NTA final key.

Chapter
Chemical Kinetics
Topic
Integrated Rate Equations
Idea tested
Zero Order Integrated Rate Law

Same idea in other shifts

Asked 2× in all
  1. 4 Apr 2025, Shift 2 · Q54Half life of zero order reaction A→product\mathrm{A\rightarrow product} is 1 hour, when initial concentration of reactant is…EasySingle correct

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 42 of the 174 JEE Main shifts held from 2017 to 2026.