JEE Main 2021 · 24 Feb · Shift 1 · Chemistry Q58

← JEE Main 2021 · 24 Feb · Shift 1

ChemistryInteger+4 / -1Question 58 of 90

Gaseous cyclobutene isomerizes to butadiene in a first order process which has a 'k' value of $3.3\times10^{-4}$ s $^{-1}$ at 153°C. The time in minutes it takes for the isomerization to proceed 40% to completion at this temperature is _______. (Rounded off to the nearest integer)

Your answer

Answer and worked solution

Official answer: 26

First order $t=\dfrac{\ln(1/0.6)}k=\dfrac{0.511}{3.3\times10^{-4}}\approx1548$ s ≈ 26 min.

Answer: 26

Topics:Integrated rate equations

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JEE Main 2021 · 24 Feb · Shift 1, Chemistry question 58