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In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15
minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]
minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]
- a)30 minutes
- b)15 minutes
- c)7.5 minutes
- d)60 minutes
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
In a first order reaction, the concentration of the reactant, decrease...
The correct answer is Option A.
The concentration of the reactant decreases from 0.8M to 0.4M in 15 minutes, i.e. t1/2 = 15 minutes. Therefore, the concentration of the reactant will fall from 0.1M to 0.025M in two half lives. i.e. 2t1/2 = 2 × 15 = 30 minutes.
The concentration of the reactant decreases from 0.8M to 0.4M in 15 minutes, i.e. t1/2 = 15 minutes. Therefore, the concentration of the reactant will fall from 0.1M to 0.025M in two half lives. i.e. 2t1/2 = 2 × 15 = 30 minutes.
Most Upvoted Answer
In a first order reaction, the concentration of the reactant, decrease...
If the concentration changes from 0.8 M to 0.4 M in 15 minutes that means the concentration is getting halved in 15 minuter (or) the half life of the reaction is 15 minutes.
Now when the concentration changes from 0.1 M to 0.025 M it means the concentration is becoming one-fourth the initial value which is possible when the time period is equal to 2 half lives (for one half life it becomes 1/2 and for the other half it becomes 1/4). So, the time taken is 30 minutes.
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Community Answer
In a first order reaction, the concentration of the reactant, decrease...
Since in 1st case concentration is getting halved so we can apply formula
k= 0.693/t (1/2) where the value of t 1/2 is 15 min.
Now, time taken for concentration to change is
t = 2.303/k log a/(a - x)
on putting values we get
t = 2.303 * 15/0.693 log (0.1/0.025)
t = 29.9 min ~ 30 min
k= 0.693/t (1/2) where the value of t 1/2 is 15 min.
Now, time taken for concentration to change is
t = 2.303/k log a/(a - x)
on putting values we get
t = 2.303 * 15/0.693 log (0.1/0.025)
t = 29.9 min ~ 30 min
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In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]a)30 minutesb)15 minutesc)7.5 minutesd)60 minutesCorrect answer is option 'A'. Can you explain this answer?
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In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]a)30 minutesb)15 minutesc)7.5 minutesd)60 minutesCorrect answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]a)30 minutesb)15 minutesc)7.5 minutesd)60 minutesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]a)30 minutesb)15 minutesc)7.5 minutesd)60 minutesCorrect answer is option 'A'. Can you explain this answer?.
In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]a)30 minutesb)15 minutesc)7.5 minutesd)60 minutesCorrect answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]a)30 minutesb)15 minutesc)7.5 minutesd)60 minutesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is - [AIEEE-2004]a)30 minutesb)15 minutesc)7.5 minutesd)60 minutesCorrect answer is option 'A'. Can you explain this answer?.
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