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Atoms and Nuclei question

2021 · Shift 1 · Q42
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  5. /2021 · Shift 1 · Q42

Atoms and Nuclei question

2021 · Shift 1 · Q42

JEE AdvancedPhysicsAtoms and NucleiMCQ+3 / −1
A heavy nucleus Q of half-life 20 minutes undergoes alpha-decay with probability of 60% and beta-decay with probability of 40%. Initially, the number of Q nuclei is 1000. The number of alpha-decays of Q in the first one hour is
  1. A
    50
  2. B
    75
  3. C
    350
  4. D
    525
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