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Introduction

If the reacti...

Question

If the reaction rate at a given temperature become slower then __________.

A

the free energy of activation is higher

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B

the free energy of activation is lower

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C

the entropy changes

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D

the initial concentration of the reactants remains constant

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Solution

The correct option is C the free energy of activation is higher
Slower reaction rate indicates higher energy of activation. Option A is correct.

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Similar questions

Q. Assertion: Increasing the concentration of reactants will cause a reaction to proceed faster.
Reason: More reactants lowers the activation energy of a reaction.

Q. The energy of activation for a reaction is

100 k J m o l^{- 1}

. Presence of a catalyst lowers the energy of activation by 75%. The ratio of final rate to initial rate is:

Q. Assertion :If temperature does not affect the rate of reaction,

E_{a} = 0

. Reason: Lesser is the activation energy, slower is the rate.

Q. Assertion :If the activation energy of a reaction is zero, temperature will have no effect on the rate constant. Reason: Lower the activation energy, faster is the reaction.

Q. The half life for a reaction between fixed concentration of reactants varies with temperature as follows:

\begin{matrix} T^{o} C & 520 & 533 & 555 & 574 t_{1 / 2} (s e c) & 1288 & 813 & 562 & 477 \end{matrix}

Calculate the activation energy of this reaction.

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