Pink solution forms a blue precipitate, Blue precipitate dissolves to form a pale yellow solution, Pale yellow solution oxidises on air to the darker yellow (brown) solution, Pink solution gradually changes to blue, Yellow-brown solution forms a brown precipitate, Green solution forms a green precipitate, Green precipitate dissolves to form a green solution, Green precipitate dissolve, but eventually violet or purple solution forms, Green solution changes to yellow, Yellow solution changes into an orange solution, The colour changes from orange to green, The colour changes from green to blue, Pale pink solution forms a brown precipitate, which doesn’t dissolve in excess aqueous sodium hydroxide, Yellow solution turns into light blue, Green solutions turns into purple

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