1.

which of the following stament is not correct?

Answer»

Pure PARA hydrogen can be OBTAINED by cooling ordinaiy hydrogen to about 20 K.
The ratio of ORTHO and para hydrogen at 300 K and above is 3 : 1.
The ratio of ortho to para hydrogen varies with temperature.
Pure ortho hydrogen can be obtained by heating ORDINARY hydrogen above 300 K.

Solution :Pure ortho hydrogen cannot be obtained by heating ordinary hydrogen.


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