Chemical Kinetics Question 51
Question: 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
Options:
A) 60 minutes
B) 15 minutes
C) 7.5 minutes
D) 30 minutes
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ {t_{1/2}}=15minute $
$ \therefore t=\frac{2.303\times 15}{0.693}\log \frac{0.1}{0.025}=30\min $
