JEE Main · 2021 · Shift-IeasyCK-067

Isotope(s) of hydrogen which emits low energy - particles with t1/2 value 12 years is/are

Chemical Kinetics · Class 12 · JEE Main Previous Year Question

Question

Isotope(s) of hydrogen which emits low energy β\beta^- particles with t1/2t_{1/2} value >12> 12 years is/are

Options
  1. a

    Protium

  2. b

    Tritium

  3. c

    Deuterium

  4. d

    Deuterium and Tritium

Correct Answerb

Tritium

Detailed Solution
  • Protium (1H^{1}\mathrm{H}): stable, no radioactive decay.
  • Deuterium (2H^{2}\mathrm{H}): stable, no radioactive decay.
  • Tritium (3H^{3}\mathrm{H}): radioactive, emits low energy β\beta^- particles with t1/2=12.32t_{1/2} = 12.32 years >12> 12 years. ✓

Answer: Option (2) — Tritium

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