WAEC Chemistry 2015 Theory — Question 39

Model answer

I. When chlorine gas is bubbled through aqueous sodium iodide, the solution turns reddish-brown (iodine is displaced). II. When chlorine gas is passed over heated iron, a brownish solid (iron (III) chloride, FeCl₃) is formed. III. When aqueous silver trioxonitrate (V) is added to aqueous sodium bromide, a pale (cream) precipitate of silver bromide is observed.