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

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

JEE MainJEE Main 2021Chemical Kinetics

Solution:

${ }_{1}^{1} H$ and ${ }_{1}{ }^{2} H$ are stable while ${ }_{1}{ }^{3} H$ is radioactive.