Question

Orthohydrogen and parahydrogen have

• A. Same nuclear spin, different physical and chemical properties
• B. Same nuclear spin with identical physical and chemical properties
• C. Different nuclear spin with differences in physical and chemical properties
• D. Different nuclear spin and with different physical properties

Answer 1

The correct option is D Different nuclear spin and with different physical properties

Ortho hydrogen are hydrogen molecule those in which the spin of both nuclei will be in same direction whereas in para hydrogen both the nuclei will spin in opposite direction. Thus ortho and para hydrogen will differ in nuclear spin of both atoms.
Ortho and para hydrogen have same chemical property but different physical property due to varying electron distribution in the structures.