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  • For a first order reaction (a) The degree of dissociation is equal to <img alt="1-\mathrm{e}^{-\mathrm{kt}}" src="https://entrancecorner.oncodecogs.com/gif.latex?1-%5Cmathrm%7Be%7D%5E%7B-%5C

For a first order reaction
(a) The degree of dissociation is equal to 1-\mathrm{e}^{-\mathrm{kt}}
(b) A plot of reciprocal of concentration of reactant vs. time gives a straight line.
(c) The time taken for the completion of 75 % of reaction is thrice the \mathrm{t_{1 / 2}}  of the reaction.
(d) The pre-exponential factor in the Arrhenius equation has the dimensions of time.

Option: 1

A only


Option: 2

C only


Option: 3

A and B only


Option: 4

A and D only


Answers (1)

best_answer

Degree of dissociation \mathrm{(\alpha)=1-e^{-k t}}
For a first order reaction, dimensions of pre-exponential factor ' \mathrm{\mathrm{A}} ' has dimensions of \mathrm{\mathrm{T}^{-1}}

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