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किसी रेडियोएक्टिव पदार्थ की अर्द्ध - आयु 16 घण्टे है। कितने समय बाद प्रारंभिक द्रव्यमान का 25% भाग अविधटित रह जायेगा ?

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किसी रेडियोएक्टिव पदार्थ की अर्द्ध - आयु 16 घण्टे है। कितने समय बाद प्रारंभिक द्रव्यमान का 25% भाग अविधटित रह जायेगा ?
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Correct Answer - B::C
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