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In context with the industrial preparation of hydrogen from water gas (CO + H2) which of the following is the correct statement ?

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CO is oxidised to CO₂ with steam in the presence of a catalyst followed by absorption of CO₂ in alkali

CO and H₂ are fractionally separated using difference in their densities

CO is removed by absorption in aqueous Cu₂Cl₂

H₂ is removed through occlusion with Pd

answer is A.

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Detailed Solution

The water gas is mixed with excess of steam and passed $450^{0} C$ over a heated catalyst $({Fe}_{2} O_{3} + {Cr}_{2} O_{3}) .$ CO is mostly oxidised to ${CO}_{2}$ and more $H_{2}$ is set free. ${CO}_{2}$ is absorbed in alkali.

$\underset{⏟}{CO + H_{2}} + H_{2} O \overset{Catalyst}{\to} {CO}_{2} + 2 H_{2} water gas Steam$

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