Chemical Kinetics Question 298
Question: The reaction $ L\xrightarrow{{}}M $ is started with 10.0 g of L. After 30 and 90 minutes 5.0 g and 1.25 g of L respectively are left. The order of the reaction is
Options:
A) 0
B) 1
C) 2
D) 3
Show Answer
Answer:
Correct Answer: B
Solution:
[b] After every 30 minutes the amount is reduced to $ \frac{1}{2} $ therefore $ {t_{1/2}} $ is 30 minutes.
In 90 minutes the amount is reduced to $ \frac{1}{8} $ i.e. $ \frac{1}{2^{n}} $ . Here n = 3. True for 1st order reaction.
