Question

Choose the correct statement with respect to ortho hydrogen:
Statement-I: In ortho hydrogen, the spin of both nuclei are in same direction.
Statement-II: Ortho hydrogen is more abundant than para hydrogen at room temperature.
Statement-III: Thermal conductivity of ortho hydrogen is more than para hydrogen.

• A. I, III
• B. I, II
• C. II, III
• D. I, II, III

Answer 1

The correct option is B I, II

Statement-I: In ortho hydrogen spins of both nuclei are in same direction.
Statement -II: At 0 K, hydrogen contains mainly para hydrogen which is more stable. At the room temperature, the ratio of ortho to para hydrogen is 3:1.
Statement -III : Thermal conductivity of para hydrogen is more than ortho hydrogen.