Question

Aluminium occurs in combined state whereas gold is found in free state. Why?

Answer 1

Because aluminum is more reactive that gold and gold is least reactive, as aluminum is place above in reactivity series it is more reactive and hence reacts to form compounds but gold is least reactive hence it does not form compounds

Answer 2

Best Answer

From their positions in the activity series, we can see that aluminum is much more reactive than silver. Aluminum will rapidly combine with oxygen in the air to make Al2O3, but silver won't. Silver will react with sulfur to form Ag2S. In basic aqueous solution aluminum ions form Al(OH)3(s) and Al(OH)4^+. Ag+ ions react with OH- ions to make Ag2O(s). In basic solutions aluminum metal reacts with water to make Al3+ and H2 gas. In basic solution silver metal only gets wet.