Ethene is a hydrocarbon. Which row gives the kind of bond linking the carbon atoms in ethene, and the effect of ethene on aqueous bromine?
- Asingle bond; colour changes from brown to colourless
- Bsingle bond; colour changes from colourless to brown
- Cdouble bond; colour changes from brown to colourless
- Ddouble bond; colour changes from colourless to brown