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JEE Advanced Model Paper 8 with solutions for online practice
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© examsnet.com
Question : 84
Total: 84
A radioactive sample decays through two different decay process α decay and β decay. Half-life time for α decay is 3 h and half-life time for β decay is 6 h. what will be the ratio of the number of initial radioactive nuclei to the number of radioactivenuclei present after 6h?
Your Answer:
Validate
Solution:
t
eq
=
t
1
t
2
t
1
+
t
2
=
6
×
3
6
+
3
= 2h
6h = 3
(
t
eq
)
⇒ N =
N
0
(
2
)
3
⇒
N
0
N
= 8
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