Name a metal that is not attacked by cold water, boiling water or steam.

26 A substance was burnt in air. The white residue obtained was added to water. This water solution turned red litmus into blue. State whether the substance is a metal or a non-metal? 27 An oxide solution of which of the following elements will turn blue litmus red? Calcium sulphur iron sodium. 29 Name one metal that decomposes boiling water and not cold water 30 Arrange the following metals in the order of their decreasing chemical activity: magnesium, iron, gold