Q. $Ortho\ and\ para$ hydrogen differ in
A) Nuclear charge
B) Nuclear reaction
C) Electron spin
D) Proton spin
Explanation
The correct answer is Option D: Proton spin.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.