The compound obtained on reaction of iron with steam is/are :
(a) Fe2O3
(b) Fe3O4
(c) FeO
(d) Fe2O3 and Fe3O4
OR
An element ' X ' reacts with O2 to give a compound with a high melting point. This compound is also soluble in water. The element ' X ' is likely to be :
(a) iron
(b) calcium
(c) carbon
(d) silicon