NEET2021Chemistry-Chemical Kinetics
NEET 2021 Chemistry Arrhenius Equation MCQ Question
Type: MCQ-numerical-Medium-Class 12
The slope of Arrhenius Plot (ln k v/s 1/T) of first order reaction is −5 × 10³ K. The value of Eₐ of the reaction is. Choose the correct option for your answer. [Given R = 8.314 J/K⁻¹mol⁻¹]
A
41.5 kJ mol⁻¹
B
83.0 kJ mol⁻¹
C
166 kJ mol⁻¹
D
−83 kJ mol⁻¹
Correct Answer
Option A
Detailed Explanation
The slope of the Arrhenius plot is equal to -Eₐ/R. Therefore, Eₐ = slope × R = 5 × 10³ K × 8.314 J/K⁻¹mol⁻¹ = 41.57 kJ mol⁻¹. The closest option is 41.5 kJ mol⁻¹.
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