Question

The production of dihydrogen obtained from coal gasification can be increased by reacting carbon monoxide of syngas mixture with steam in presence of a catalyst iron-chromium. What is this process called?
A.Hydrogen reaction
B.Water-gas shift reaction
C.Coal-gas shift reaction
D.Syn gasification

Answer 1

Hint: Hydrogen is a unique element and there are various steps involved in its preparation. It is further a very reactive element and forms many hydrides and other compounds. To solve this question we need to know about the various techniques involved in the preparation of hydrogen.

Complete step by step answer:
Hydrogen is a very reactive element and it forms many hydrides and compounds. Its preparation is broadly classified as laboratory preparation and commercial preparation. Now, we will discuss both the types of preparations.
So, the first one is laboratory preparation. In this method, when granulated zinc is reacted with dilute hydrochloric acid, hydrogen is obtained. We can also prepare hydrogen by reacting zinc with aqueous alkali. The reaction is as shown:
 $Zn + 2NaOH \to N{a_2}Zn{O_2} + {H_2}$
Now, in the commercial method, we have a method in which we obtain the water-gas shift reaction. When steam reacts with hydrocarbons at very high temperature in the presence of some catalyst, then hydrogen is obtained. Now, the mixture of carbon monoxide and water is called water gas. This water gas is also known as syngas or synthesis gas. The reaction given below is known as the water gas shift reaction.
 $CO(g) + {H_2}O \to C{O_2}(g) + {H_2}O(g)$
So, the production of dihydrogen can be increased by reacting carbon monoxide of syngas with steam and this is called water-gas shift reaction.
Hence, option B is correct.

Note: We can also obtain hydrogen by electrolyzing acidified water using platinum electrodes. Also, we can electrolyze warm aqueous barium hydroxide solution between nickel electrodes to obtain hydrogen of high purity.