Question

1.
In which of the following reaction,reduction of hydrogen
takes place ?
1. Carbon Monoxide + Copper Oxide Carbon Dioxide
+ Copper
2. Copper Oxide + Hydrochlorid Acid Water +
Copper Chloride
3. Steam + Iron Hydrogen + Iron oxide
4. Hydrogen+ Iron Oxide Water + Iron

Answer 1

Answer:

When carbon monoxide is passed over heated copper oxide it gives carbon dioxide gas and copper metal.

Copper(II) oxide dissolves in mineral acids such as hydrochloric acid, sulfuric acid or nitric acid to give the corresponding copper(II) salts: CuO + 2 HNO3 → Cu(NO3)2 + H2O. CuO + 2 HCl → CuCl2 + H2O.

The “Steam-Iron” process produces high-purity hydrogen by separating the hydrogen production and feedstock oxidation steps using iron oxides subjected to redox cycles. Simplistically, the chemistry of the “Steam-Iron” process involves two subsequent reactions,

Iron Oxides Reduction with Hydrogen. Iron oxides reduction with hydrogen is reverse to the oxidation, and the thermochemical limitations of the process are given in Figure 2. It can be seen that Fe3O4 or Fe0.947O reduction to metallic iron terminates at relatively low concentration of steam in H2-H2O atmosphere.