(a) Name one metal in each case Which: (i) exists as a liquid at room temperature, (ii) can be found in nature in the uncombined state
(b) X and Y are 0.5 mol. dm\(^{-3}\) freshly prepared aqueous solutions of two salts of iron (II) With excess sodium hydroxide solution, X gave a dirty green precipitate which was not obtained in the case of Y.
Explanation
a)(i) Caesium(Cs) (ii) Gold (Au)
(b) Solution Y has been oxidized to iron (III) salts and it will give a reddish brown precipitate with excess sodium hydroxide.
