AIPMT MAINS2012Chemistry-Chemical Kinetics
AIPMT MAINS 2012 Chemistry Arrhenius Equation MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Activation energy (Eₐ) and rate constants (k₁ and k₂) of a chemical reaction at two different temperatures (T₁ and T₂) are related by:
A
ln K₂/K₁ = -Eₐ/R (1/T₁ - 1/T₂)
B
ln K₂/K₁ = -Eₐ/R (1/T₂ - 1/T₁)
C
K₂/K₁ = -Eₐ/R (1/T₂ + 1/T₁)
D
ln K₂/K₁ = Eₐ/R (1/T₁ - 1/T₂)
Correct Answer
Option B and Option D — both accepted
The examination board accepted both (B) and (D) as correct for this question. Full marks are awarded to every candidate.
Detailed Explanation
The Arrhenius equation relates the rate constants at two different temperatures. The correct form is ln(k₂/k₁) = -Eₐ/R (1/T₂ - 1/T₁), which matches option B.
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