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JEE Main 20188 April
Exam
JEE Main
Year
2018
Date
8 April
Subject
Chemistry
Chapter
Chemical Equilibrium

JEE Main 2018 · 8 April · Chemistry · Chemical Equilibrium

Which of the following lines correctly show the temperature...

Which of the following lines correctly show the temperature dependence of equilibrium constant K,K, for an exothermic reaction?
Which of the following lines correctly show the temperature dependence of equilibrium constant K, for an exothermic

Options

  1. AA and DA \text{ and } D
  2. BA and BA \text{ and } B
  3. CB and CB \text{ and } C
  4. DC and DC \text{ and } D

Correct answer

B. A and BA \text{ and } B

Step-by-step solution

The Arrhenius equation in Logarithmic form:

InK=−∆HRT+lnAInK = - \dfrac{∆ H}{RT} + lnA

On comparing with y=mx+c,m=−∆HRy = mx + c, m = - \dfrac{∆ H}{R} and c=lnAc = lnA.

For an exothermic reaction, the value of ∆H<0∆ H < 0, slope will be positive and the intercept can be either positive or negative.

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