question_answer

Ortho and para hydrogen:

A)  have different masses

B)  have different atomic number

C)  differ in the spin of their nuclei

D)  differ in the spin of their electrons

Correct Answer: C

Solution :

Ortho and para hydrogen differ in the spin of nuclei. In ortho hydrogen, both hydrogen atom have spin of proton in same direction while in para-hydrogen, they have spin in opposite direction.