Question

Which molecule will decolourize bromine in carbon tetrachloride most readily?



a. 1,2-dimethylcyclopropane



b. Cyclopentane



c. 1,2-dimethylcyclobutane



d. Cyclohexane?

Answer 1

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 color to give a colorless liquidAlkenes contain a C=C double bond and thus we call them "unsaturated hydrocarbons". Bromine (Br2) breaks this C=C double bond and attaches itself to the Alkene molecule, forming an Alkane. ... It's not just Cyclohexene, but ALL Alkene molecules thatdecolourise when they react withBromine water. so the answer is cyclohexane

Answer 2

Answer:

Correct answer is A) 1,2-dimethylcyclopropane