A factory makes polymers from alkenes. A cylinder of hydrocarbon gas is labelled as an alkene, but it may contain an alkane instead.
Before using it, a chemist bubbles a sample of the gas through bromine water. The bromine water stays orange.
Which conclusion about the gas is correct?
The gas is an alkene, as labelled.
The gas has reacted with the bromine water.
The gas is an alkane, not an alkene.
The gas is a mixture of an alkane and an alkene.