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In a hydrogen molecule, when the spins are in the same direction. What is it known as?(a) adsorbent hydrogen(b) nascent hydrogen(c) parahydrogen(d) ortho hydrogenI have been asked this question in an international level competition.This intriguing question comes from Dihydrogen as a Fuel topic in chapter Hydrogen of Chemistry – Class 11

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Right ANSWER is (d) ortho hydrogen

Explanation: When in the hydrogen molecule, the nucleus spins are in the same DIRECTION, it is known as orthohydrogen. When the spins are in the opposite direction, it is known as parahydrogen. At room TEMPERATURE hydrogen consists of 75% ortho and 25% para hydrogens.



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