S, T and U are the aqueous chlorides of the elements X, Y and Z respectively
CHEMISTRY · Single correct · A Level · Chemistry · Reactions of ions in aqueous solution · Reactions of ions in aqueous solution
Problem
S, T and U are the aqueous chlorides of the elements X, Y and Z respectively. X, Y and Z are in the same period of the periodic table. U gives a white precipitate with NaOH but this white precipitate dissolves as more NaOH is added. When NaOH is added to T, a white precipitate forms which does not dissolve when more base is added. S does not give precipitate with NaOH. Which of the following statements are correct ?
(1) The three elements are metals
(2) The electronegativity decreases from X to Y to Z.
(3) X, Y and Z could be sodium, magnesium and aluminium respectively.
(4) The first ionization increases from X to Y to Z.