Which metals do not react with cold as well as hot water

• GC Metals Non-Metals

Which one of the following metals do not react with cold as well as hot water?

1. Na
2. Ca
3. Mg
4. Fe

Answer

Na, Ca and Mg are reactive metals and quickly react with water. At room temperature, the reaction of Fe is very slow but red hot iron reacts with steam to form Fe₃O₄ with hydrogen gas.

3Fe + 4H₂O → Fe₃O₄ + 4H₂

The correct option is D.