Question

(a) Why is calcium starts floating when added to water ? (b) Most of the metals do not give hydrogen while reacting with nitric acid. Why ? (c) Write equation for the reaction of iron with steam. Name the compound of iron obtained

Answer 1

a.) density of calcium is less than that of water

b.)Nitric acid is very good oxidising agent , on its decomposition it oxidises hydrogen to water

c.) 3Fe + 4H2O -> Fe3O4 + 4H2

The compound formed is triferic tetraoxide or you can call it feriso ferric oxide.

Answer 2

hope it helps u........