Question

When steam is passed over red hot iron, water gas is formed. If this is true enter 1, if false enter 0.

Answer 1

When water molecules comes in contact with surface having temperature more than ${500^o}C$ it forms hydrogen and oxygen

Complete step by step answer:
Let’s start with discussing a little about the red hot iron to get a better understanding of the question. The red hot iron is the term which is used for iron or steel when it is heated above ${460^o}C$. Above ${460^o}C$ temperature the iron becomes so hot that it starts to glow red and hence we get the name red hot iron.
As for the properties of water, the water evaporates and forms vapour at the temperature of ${100^ \circ }C$ which are pure ${H_2}O$in nature. Also when water molecules come in contact with a surface having temperature more than ${500^o}C$ it forms hydrogen and oxygen. This means that when the steam comes in contact with red hot iron, water gas will not form. Instead something else will be forming.
When steam is passed over red hot iron, hydrogen along with $F{e_3}{O_4}$will be formed. The reaction is reversible in closed conditions. The reaction is given below:
$3Fe + 4{H_2}O \to F{e_3}{O_4} + 4{H_2} \uparrow$
Hence, we will enter 0 which indicates that the statement is false.

Note:
We must know that the iron (Fe) is not so reactive with steam as compared with other elements. But the reaction happens when we pass the steam through red hot iron which results in the formulation of $F{e_3}{O_4}$. The reaction is reversible when performed in a closed chamber. Also the red hot iron is the iron with the temperature above ${500^o}C$.