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For a first order reaction:           
  • a)
    The degree of dissociation is equal to (1 – e–kt)           
  • b)
    A plot of reciprocal concentration of the reactant vs time gives a straight line           
  • c)
    The time taken for the completion of 75% reaction is thrice the t1/2 of the reaction.           
  • d)
    The pre-exponential factor in the Arrhenius equation has the dimension of time T–1
Correct answer is option 'A,D'. Can you explain this answer?
Most Upvoted Answer
For a first order reaction:a)The degree of dissociation is equal to (1...
The degree of dissociation (α) is defined as the fraction of the initial concentration of a reactant that has undergone reaction. For a first-order reaction, the rate equation is given by:

rate = k[A]

where [A] is the concentration of the reactant A and k is the rate constant.

The integrated rate equation for a first-order reaction is:

ln([A]t/[A]0) = -kt

where [A]t is the concentration of A at time t and [A]0 is the initial concentration of A.

From the integrated rate equation, we can see that the concentration of A decreases exponentially with time. At any time t, the concentration of A that has undergone reaction is given by [A]0 - [A]t.

The degree of dissociation (α) is defined as the fraction of the initial concentration of A that has undergone reaction. Therefore, for a first-order reaction, the degree of dissociation is equal to (1 - [A]t/[A]0).
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For a first order reaction:a)The degree of dissociation is equal to (1 – e–kt)b)A plot of reciprocal concentration of the reactant vs time gives a straight linec)The time taken for the completion of 75% reaction is thrice the t1/2 of the reaction.d)The pre-exponential factor in the Arrhenius equation has the dimension of time T–1Correct answer is option 'A,D'. Can you explain this answer?
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For a first order reaction:a)The degree of dissociation is equal to (1 – e–kt)b)A plot of reciprocal concentration of the reactant vs time gives a straight linec)The time taken for the completion of 75% reaction is thrice the t1/2 of the reaction.d)The pre-exponential factor in the Arrhenius equation has the dimension of time T–1Correct answer is option 'A,D'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about For a first order reaction:a)The degree of dissociation is equal to (1 – e–kt)b)A plot of reciprocal concentration of the reactant vs time gives a straight linec)The time taken for the completion of 75% reaction is thrice the t1/2 of the reaction.d)The pre-exponential factor in the Arrhenius equation has the dimension of time T–1Correct answer is option 'A,D'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a first order reaction:a)The degree of dissociation is equal to (1 – e–kt)b)A plot of reciprocal concentration of the reactant vs time gives a straight linec)The time taken for the completion of 75% reaction is thrice the t1/2 of the reaction.d)The pre-exponential factor in the Arrhenius equation has the dimension of time T–1Correct answer is option 'A,D'. Can you explain this answer?.
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