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A radio active element "X" with a half life of 2 hours decay giving a stable element "Y". After a time of t hours the ratio of atoms is 1 : 7 then, the value of t
Correct Answer: (b)
Official keyThis question appeared in the TNPSC Prelims 2017 examination (GS). It is Question 101 out of 200 questions in this paper.
This question was part of the TNPSC Prelims 2017 (GS). The TNPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all TNPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.