Questions
A certain substance decay to of its initial activity in 24 days . Calculate its mean life ( approximately in days)
a
6
b
8.5
c
9
d
5
detailed solution
Correct option is B
Decay law, NNo=12n here n = no of half lives ⇒116=12n ⇒124=12n ⇒n=4 Now, n=tT1/2 ⇒T1/2 = tn=244=6 days and Tm=T1/2ln2 ⇒Tm = 60.693=8.65 daysTalk to our academic expert!
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