Which one of the following statements is incorrect with regard to and para dihydrogen ?

Options

A. They are nuclear spin isomers
B. The ortho isomer has zero nuclear spin whereas the para isomer has one nuclar spin.
C. The para isomer is favoured at low temperature.
D. It is never possible to obtain `100%` pure ortho isomer.

Answer

B

Explanation

The spin of the proton in ortho hydrogen are in the same direction. In para hydrogen the protons spin in opposite direction.