Question
The half-life of an element is 5 years, what fraction of
that radioactive substance will remain after 20 years?Solution
t1/2 =5year 20 year = 20/5 = 4t1/2 4t1/2= (1/2)⁴= 1/16
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Match List-I (Famous Place) with List-II (Country) and select the correct answer using the codes given below the lists:
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