Chemistry-Rate of Reaction
NEET Chemistry Rate of Reaction MCQ Question
Type: MCQ-numerical-Easy-Class 12
What is the rate constant k at 700K if the activation energy Ea is 209 kJ/mol and the frequency factor A is 1.60 × 10^11 s^-1?
A
6.36 × 10^-3 s^-1
B
50 × 10^-3 s^-1
C
20 × 10^-3 s^-1
D
8.00 × 10^-3 s^-1
Correct Answer
Option A
Detailed Explanation
Using the Arrhenius equation log k = -Ea/(2.303RT) + log A, with Ea = 209 kJ/mol, A = 1.60 × 10^11 s^-1, R = 8.314 J/mol K, and T = 700K, we find k = 6.36 × 10^-3 s^-1.
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