A) \[CO\] and \[{{H}_{2}}\] are fractionally separated using differences in their densities
B) CO is removed by absorption in aqueous \[C{{u}_{2}}C{{l}_{2}}\] solution
C) \[{{H}_{2}}\] is removed through occlusion with Pd
D) CO is oxidised to \[C{{O}_{2}}\] with steam in the presence of a catalyst followed by absorption of \[C{{O}_{2}}\]in alkali
Correct Answer: D
Solution :
[d] On die industrial scale hydrogen is prepared from water gas according to following reaction sequence \[\underbrace{CO+{{H}_{2}}}_{water\,gas}+\underbrace{{{H}_{2}}O}_{(steam)}~\xrightarrow{catalyst}C{{O}_{2}}+2{{H}_{2}}\] \[\xrightarrow[(alkali)]{2NaOH}N{{a}_{2}}C{{O}_{3}}+{{H}_{2}}O\] From the above it is clear that CO is first oxidised to \[C{{O}_{2}}\] which is then absorbed in \[NaOH.\]
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