Find out the incorrect order against the mentioned properties:
H2<D2<T2 (Number of protons)
T2<D2<H2 (Relative abundance)
H2<D2<T2 (Number of neutrons)
The correct option is A H2<D2<T2 (Number of protons)
Number of protons in H2, D2 and T2 are equal, they differ in number of neutrons. Since mass of H2 is less than D2 the bond energy of deuterium is greater.