Question

Ortho and para hydrogen differ:

• A. in the number of protons
• B. in the molecular mass
• C. in the nature of spins of protons
• D. in the nature of spins of electrons

Answer 1

Answer: (C)

in the nature of spins of protons

Ortho and para hydrogens differ in the nature of spins of protons. In ortho, hydrogen, the spins of two protons are in the same direction whereas, in para-hydrogen, the spins of two protons are in the opposite direction.

Hence, the correct option is $\text{C}$