AIPMT PRELIMS2003Chemistry-Chemical Kinetics

AIPMT PRELIMS 2003 Chemistry Arrhenius Equation MCQ Question

Type: MCQ-conceptual-Medium-Class 12

The temperature dependence of rate constant (k)(k) of a chemical reaction is written in terms of Arrhenius equation, k=AeE/RTk = A e^{-E/RT}. Activation energy (E)(E^*) of the reaction can be calculated by plotting

A

kk vs TT

B

kk vs 1logT\frac{1}{\log T}

C

logk\log k vs 1T\frac{1}{T}

D

logk\log k vs 1logT\frac{1}{\log T}

Correct Answer

Option C

Detailed Explanation

The Arrhenius equation can be linearized to logk=logAERT\log k = \log A - \frac{E^*}{RT}. A plot of logk\log k vs 1T\frac{1}{T} gives a straight line with slope ER-\frac{E^*}{R}.

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