Chlorine is passed as bubbles through a cylinder that holds aqueous sodium iodide and a hexane layer that does not mix with it. As the bubbles move through the cylinder, what is seen in the lower layer and in the upper layer?
- Alower aqueous layer: colourless solution becomes brown; upper hexane layer: colourless liquid becomes coloured
- Blower aqueous layer: colourless solution becomes brown; upper hexane layer: colourless liquid is unchanged
- Clower aqueous layer: brown solution becomes colourless; upper hexane layer: colourless liquid becomes coloured
- Dlower aqueous layer: brown solution becomes colourless; upper hexane layer: colourless liquid is unchanged