Geo-Scientist Prelims 2022 Chemistry Q10: Consider the following statements in respect of ortho and para form…

Consider the following statements in respect of ortho and para form of hydrogen molecule :

1. Ortho hydrogen molecules have nuclear spin vectors parallel.
2. At high temperature, hydrogen gas contains about 75% ortho hydrogen.
3. In para form of hydrogen, nuclear spins exist in opposite manner.
4. Para form has the lower energy and at absolute zero, the gas contains 100% of para form.

Which of the statements given above are correct?

1. (a) 1 and 3 only
2. (b) 2 and 4 only
3. (c) 1, 3 and 4 only
4. (d) 1, 2, 3 and 4