${\mathrm{C}}^{14}$is a beta active nucleus. A sample of ${\mathrm{C}}^{14}{\mathrm{H}}_4$gas kept in a closed vessel shows increase in pressure With time. This is due to:

${\mathrm{C}}^{14}$is a beta active nucleus. A sample of ${\mathrm{C}}^{14}{\mathrm{H}}_4$gas kept in a closed vessel shows increase in pressure With time. This is due to: the formation of ${\mathrm{N}}^{14}{\mathrm{H}}_3\text{ and }{\mathrm{H}}_2$

because Nitrogen in the atmosphere combines with methane to produce ammonia and hydrogen. Thus, the creation of${\mathrm{N}}^{14}{\mathrm{H}}_3$ and ${\mathrm{H}}_2$ is what is responsible for the increase in pressure.