In context with the industrial preparation of hydrogen from water gas `(CO+H_2)`, which of the following is the correct statement? : `CO and H_2` are fractionally separated using differences in their densities. , `CO` is removed by absorption in aqueous `Cu_2Cl_2` solution. , `H_2` is removed through occlusion with Pd. , `CO` is oxidized to `CO_2` with steam in the presence of a catalyst followed by absorption of `CO_2` in alkali.

Options

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 oxidized to `CO_(2)`, with steam in the presence of a catalyst followed by absorption of `CO_(2)`, in alkali

Answer

D

Explanation

Hydrogen is made in large amounts by the steam reformer process. When water gas is passed over iron or copper catalyst at `400^(@)`C, CO gets converted into `CO_(2)`,. Finally `CO_(2)`, is absorbed in a solution of alkali.