Question

67. Which of the following statements is not
correct?
(a) Pure para hydrogen can be obtained by
cooling ordinary hydrogen to about 20 K
(b) The ratio of ortho and para hydrogen at 300
K and above is 3:1.
(c) The ratio of ortho to para hydrogen varies
with temperature.
(d) Pure ortho hydrogen can be obtained by
heating ordinary hydrogen above 300 K.

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Answer 1

Option a is the answer