Question

2. Predict the occurrence of the following metals.
a. Noble metals (like gold)
b. Moderately reactive metals (like iron)
c. Highly reactive metals (like sodium)​

Answer 1

Explanation:

(i) Sodium being highly reactive in nature, it does not occur in free state. It occurs as : NaCl, NaNO3, Na2SO4 and Na2B4O7.10H2O.

(ii) Iron being moderately reactive in nature, it does not occur in free state. In combined state it occurs as : Fe2O3, Fe3O4, FeCO3, FeS2 and CuFeS2.

(iii) Noble metal like gold being non-reactive do not occur free in nature.