An organic compound reacted with bromine water to give a colourless solution. The compound is probably an
-
A.
alkene -
B.
alkanal -
C.
alkyne -
D.
alkanone
Correct Answer: Option A
Explanation
Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. The bromine loses its original red-brown colour to give a colourless liquid.
Alkynes also react with bromine, decolorising it though not as immediate as alkenes.