Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
Consider an endothermic reaction, $X \longrightarrow Y$ with the activation energies $E_b$ and $E_f$ for the backward and forward reactions, respectively. In general
ChemistryThermodynamics (C)JEE MainJEE Main 2005
Options:
  • A
    $\mathrm{E}_{\mathrm{b}} < \mathrm{E}_{\mathrm{f}}$
  • B
    $E_b>E_f$
  • C
    $E_b=E_f$
  • D
    There is no definite relation between $E_b$ and $E_f$
Solution:
1960 Upvotes Verified Answer
The correct answer is:
$\mathrm{E}_{\mathrm{b}} < \mathrm{E}_{\mathrm{f}}$
$\Delta \mathrm{H}=\mathrm{E}_{\mathrm{f}}-\mathrm{E}_{\mathrm{b}}$
For $\Delta H=$ Positive, $E_b < E_f$

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.