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Standard XI
Chemistry
Half and Average Life
Disintegratio...
Question
Disintegration constant for a radioactive substance is
0.58
h
r
ā
1
. Its half-life period
A
8.2 hr
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B
5.2 hr
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C
1.2 hr
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D
2.4 hr
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Solution
The correct option is
C
1.2 hr
K
=
0.693
t
1
2
t
1
2
−
0.693
K
−
0.693
0.58
⇒
1.2
h
r
s
Suggest Corrections
0
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