Question

1. how water act both as oxidising and reducing agent? give example. 2. what is coal gasification?

Answer 1

coal gasification is the process of producing syn gas a mixture consisting primarily of methane,carbon monoxide,hydrogen,carbon dioxide and water vapour from coal and water,air and oxygen.historically coal was gasified using early technology to produce coal gas known as town gas.which is a combustible gas traditionally used for municipal lighting and heating before the advent of industrial scale production of natural gas.

Answer 2

Ans:- 1 We have seen that some oxidising agents, such as fluorine, can oxidize water to oxygen. There are also some reducing agents, such as lithium, which can reduce water to hydrogen. In terms of redox, water behaves much as it did in acid-base reactions, where we found it to be amphiprotic. In the presence of a strong electron donor (strong reducing agent), water serves as an oxidizing agent. In the presence of a strong electron acceptor (strong oxidizing agent), water serves as a reducing agent. Water is rather weak as an oxidizing or as a reducing agent, however; so there are not many substances which reduce or oxidize it. Thus it makes a good solvent for redox reactions. This also parallels water’s acid-base behavior, since it is also a very weak acid and a very weak base.

Ans:- 2 Coal gasification is the process of producing syngas–a mixture consisting primarily of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2), methane (CH4), and water vapour (H2O)–from coal and water, air and/or oxygen.



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