Question

........react with steam to from its oxide
a) Iron
b) Potassium
c) Sodium
d) Calcium ​

Answer 1

Answer:

iron oxide fe2o3

potassium oxide ko2

calcium oxide cao

sodium oxide Nao

Answer 2

Iron react with steam to form its oxide

Iron is a metal which did not react with cold or hot water directly. There are some criteria to form oxide from iron , when it reacts with steam.

when red hot iron reacts with steam, it forms iron oxide and iron.

The two moles of iron when reacts with four moles of water, it forms iron oxide and four moles of Hydrogen.

3Fe+ 4H2O ——› Fe3O4 + H2