Gce Model Questions Vol1 2025 Physics Question 1
Practice objective / multiple choice question 1 from the 2025 Gce Model Questions Vol1 Physics examination.
An isotope X decays to a radioactive daughter Y, which subsequently decays to a stable nuclide Z. The half‑life of X is 10 min and that of Y is 40 min. A 1.00 g sample of pure X (molar mass 240 g mol\(^{-1}\)) is prepared at time \(t=0\).\n\n(a) Determine the time after the start at which the activity of Y is maximum.\n(b) Calculate the maximum activity of Y in becquerels (Bq). (Take Avogadro's number \(N_A = 6.022\times10^{23}\) mol\(^{-1}\).)
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This is Gce Model Questions Vol1 2025 Physics Question 1. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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