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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?
Verified Answer
For a first order reaction:a)The degree of dissociation is equal to (1...
For a first order reaction, A→ Products, we have
 
In[A]/ ​[A]
0
​​=−kt or[A]t​=[A]0​e−kt
 
In terms of degree of dissociation,
 
[A]t​ = [A]0​(1−α)
 
Hence, [A]0​(1−α) = [A]0​e−kt
or α = 1−e−kt
 
The Arrehnius equation is k = Ae−Ea​/RT
 
The dimension of pre-exponential factor A in the above expression is the same as that of rate constant k. For a first order reaction, the dimension of k is t−1
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For a first order reaction:a)The degree of dissociation is equal to (1...
For a first order reaction, A→ Products, we have
 
In[A]/ ​[A]
0
​​=−kt or[A]t​=[A]0​e−kt
 
In terms of degree of dissociation,
 
[A]t​ = [A]0​(1−α)
 
Hence, [A]0​(1−α) = [A]0​e−kt
or α = 1−e−kt
 
The Arrehnius equation is k = Ae−Ea​/RT
 
The dimension of pre-exponential factor A in the above expression is the same as that of rate constant k. For a first order reaction, the dimension of k is t−1
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Community Answer
For a first order reaction:a)The degree of dissociation is equal to (1...
For a first order reaction, A→ Products, we have
 
In[A]/ ​[A]
0
​​=−kt or[A]t​=[A]0​e−kt
 
In terms of degree of dissociation,
 
[A]t​ = [A]0​(1−α)
 
Hence, [A]0​(1−α) = [A]0​e−kt
or α = 1−e−kt
 
The Arrehnius equation is k = Ae−Ea​/RT
 
The dimension of pre-exponential factor A in the above expression is the same as that of rate constant k. For a first order reaction, the dimension of k is t−1
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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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