JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 30 July 2022, Shift 2, Chemistry Q56

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

\mathrm{X} \rightarrow \mathrm{Y} + \mathrm{Z}

X decomposes at 700 K to give Y and Z. The results of two measurements are : Initial concentration of X / (mol/L) | 6.0 | 12.0 Half life / s | 1.0 | 2.0 The rate constant for the reaction is ________ (in appropriate unit)

Official answer

NTA final key.

Chapter: Chemical Kinetics
Topic: Integrated Rate Equations
Idea tested: Nth-Order Half-Life Proportionality

Same idea in other shifts

Asked 3× in all

25 Jul 2022, Shift 1 · Q85The half life for the decomposition of gaseous compound A is $240$ s when the gaseous pressure was $500$ Torr initially. When the pressure…EasyNumerical value
26 Jul 2022, Shift 1 · Q88For a reaction $\mathrm{A} \rightarrow 2\mathrm{B} + \mathrm{C}$ the half lives are 100 s and 50 s when the concentration of reactant A is…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.