A compound 'X' reacts in the following ways X(aq) --BaCl2(aq)--> White Precipitate X(aq) --KI(aq)--> — AITS & Test Series Chemistry Question

Question

A compound 'X' reacts in the following ways X(aq) --BaCl2(aq)--> White Precipitate X(aq) --KI(aq)--> Yellow precipitate X(aq) --NaOH(aq)--> Brown/black precipitate White Precipitate --NH3(aq)--> Colourless solution The compound 'X' is likely to be