Chemical Kinetics Question 114
Question: A first order reaction requires 30 minutes for 50% completion. The time required to complete the reaction by 75% will be
Options:
A) 45 minutes
B) 15 minutes
C) 60 minutes
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
$ k=\frac{0.693}{30}=0.0231 $ ; $ t=\frac{2.303}{k}\log ( \frac{100}{100-75} ) $
$ t=\frac{2.303}{0.0231}\log 4=60,minutes $
