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What is the Ortho: para ration of hydrogen?(a) 1:2(b) 1:3(c) 2:1(d) 3:1The question was posed to me at a job interview.Question is taken from Hydrogen : Properties topic in portion Hydrogenation of Unit Processes

Answer»

Right choice is (b) 1:3

For explanation I would say: The nuclear SPINS MAY be either parallel or antiparallel, these two forms have been designated “ortho” and “PARA,” respectively. At normal conditions a RATIO of ortho: para of about 3:1 exists. At low temperature the equilibrium is on the side of para-hydrogen.



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