In context with the industrial preparation of hydrogen from water gas $\left(\mathrm{CO}+\mathrm{H}_{2}\right)$, which of the following is the correct statement?

(A) CO and $\mathrm{H}_{2}$ are fractionally separated using differences in their densities

(B) CO is removed by absorption in aqueous $\mathrm{Cu}_{2} \mathrm{Cl}_{2}$ solution

(C) $\mathrm{H}_{2}$ is removed through occlusion with Pd

JEE Main · 2008 · 27 Apr 2008 · Offline · Hydrogen

In context with the industrial preparation of hydrogen from water gas

(CO + H_{2})

, which of the following is the correct statement?

(A)CO and $H_{2}$ are fractionally separated using differences in their densities
(B)CO is removed by absorption in aqueous $Cu_{2} Cl_{2}$ solution
(C) $H_{2}$ is removed through occlusion with Pd
(D)CO is oxidised to $CO_{2}$ with steam in the presence of a catalyst followed by absorption of $CO_{2}$ in alkali✓ Correct

Answer: (D)

Solution

Pure hydrogen is won from water gas by the water-gas shift: the carbon monoxide is made to react with steam over a catalyst, oxidising it to carbon dioxide while liberating more hydrogen. The carbon dioxide is then washed out by absorption in alkali, leaving hydrogen behind. So the correct description is that carbon monoxide is oxidised to carbon dioxide with steam in the presence of a catalyst, followed by absorption of the carbon dioxide in alkali.

JEE Main · 2008 · 27 Apr 2008 · Offline · Single correct option

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JEE Main · 2008 · 27 Apr 2008 · Offline · Hydrogen

Solution

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