Question
Chemistry Question on Chemical Kinetics
A human body required the 0.01 Curie activity of radioactive susbtance after 24 hours. Half life of radioactive is 6 hours. Then max. activity of radioactive sustance that can be injected will be
A
0.08
B
0.04
C
0.16
D
0.32
Answer
0.16
Explanation
Solution
The correct option is(C): 0.16. At the end of 25 hrs. activity = 0.01 M half life = 6 hrs In 24 hrs. there are 24/6 = 4 half life Activity of susbtance after n half life (A)/2^n ⇒ (A)/2^4= 0.01 (A) = 0.16.