Hydrogen can be prepared by mixing steam and water gas at `500^(@)`C in the presence of `Fe_(3)O_(4)` and `Cr_(2)O_(3).` This process is called

Hydrogen can be prepared by mixing steam and water gas at 500^(@) C in the presence of Fe_(2)O_(3) and Cr_(2)O_(3). This process is called

The conversion of K_(2)Cr_(2)O_(7) into Cr_(2)(SO_(4))_(3) is a process of

EAN of Fe in [Fe(C_(2)O_(4)_(3)]^(3-) is .

EAN of Fe in [Fe(C_(2)O_(4)_(3)]^(3-) is .

Water gas is mixed with steam and the mixture is passed over heated Fe_(2) O_(3) in presence of Cr_(2)O_(3) . The mixture when passed in water dissolves CO_(2) and dihydrogen left undissolved is collected . This method of preparation of hydrogen gas is know as

Water gas is mixed with steam and the mixture is passed over heated Fe_(2) O_(3) in presence of Cr_(2)O_(3) . The mixture when passed in water dissolves CO_(2) and dihydrogen left undissolved is collected . This method of preparation of hydrogen gas is know as

[Co(Cr_(2)O_(4))_(3)]^(3-) is a