In context with the industrial preparation of hydrogen from water gas (CO + H_2), which of the following is the correct statement?

JEE Main 2008 Chemistry question

In context with the industrial preparation of hydrogen from water gas , which of the following is the correct statement?

(1)CO and are fractionally separated using differences in their densities
(2)CO is removed by absorption in aqueous solution
(3) is removed through occlusion with Pd
(4)CO is oxidised to with steam in the presence of a catalyst followed by absorption of in alkaliCorrect

Answer: (4)

In the industrial process (water-gas shift), , and the

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Question ID VK-039050