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Question
The half-life of the radioactive substance is 40 days. The substance will disintegrate completely in
Options
40 days
400 days
4000 days
infinite time
MCQ
Solution
infinite time
Explanation:
The time it takes for a substance to completely dissolve is infinite.
log`"N"_0/0 = λt`
⇒ log`"N"_0/0 = λt`
log ∞ = λt
hence when N → 0, t → ∞
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