JEE Main 202622 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 22 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Chemical Kinetics
JEE Main 2026 · 22 January · Evening Shift · Chemistry · Chemical Kinetics
Correct statements regarding Arrhenius equation among the following...
Correct statements regarding Arrhenius equation among the following are :
A. Factor corresponds to fraction of molecules having kinetic energy less than Ea.
B. At a given temperature, lower the Ea, faster is the reaction.
C. Increase in temperature by about doubles the rate of reaction.
D. Plot of vs gives a straight line with slope .
Choose the correct answer from the options given below :
A. Factor corresponds to fraction of molecules having kinetic energy less than Ea.
B. At a given temperature, lower the Ea, faster is the reaction.
C. Increase in temperature by about doubles the rate of reaction.
D. Plot of vs gives a straight line with slope .
Choose the correct answer from the options given below :
Options
- AB and D Only
- BA and B Only
- CB and C Only
- DA and C Only
Correct answer
C. B and C Only
Step-by-step solution
The Arrhenius equation is given by .
Statement A: The factor represents the fraction of molecules having kinetic energy equal to or greater than the activation energy . Thus, statement A is incorrect.
Statement B: From the equation, as decreases, the value of increases, leading to a faster reaction rate. Thus, statement B is correct.
Statement C: For many reactions, the temperature coefficient is approximately 2, meaning the rate of reaction doubles for every rise in temperature. Thus, statement C is correct.
Statement D: Taking the natural logarithm of the Arrhenius equation, . Converting to base 10, . A plot of vs gives a straight line with slope . The statement says slope , which is only true for a vs plot. Thus, statement D is incorrect.
Therefore, statements B and C are correct.
Statement A: The factor represents the fraction of molecules having kinetic energy equal to or greater than the activation energy . Thus, statement A is incorrect.
Statement B: From the equation, as decreases, the value of increases, leading to a faster reaction rate. Thus, statement B is correct.
Statement C: For many reactions, the temperature coefficient is approximately 2, meaning the rate of reaction doubles for every rise in temperature. Thus, statement C is correct.
Statement D: Taking the natural logarithm of the Arrhenius equation, . Converting to base 10, . A plot of vs gives a straight line with slope . The statement says slope , which is only true for a vs plot. Thus, statement D is incorrect.
Therefore, statements B and C are correct.