Identifying Reactive Compounds

Of the following compounds, which will react rapidly with bromine (Br2) at room temperature in the dark?
Be sure to enter the appropriate letters in the answer box.
Do not enter superfluous characters, since they will be counted as incorrect answers.

A
Benzene
C6H6
 B
Cyclohexene
C6H10
 C
Cyclohexane
C6H12
 D
Propanoic Acid
C2H5CO2H
 E
Phenol
C6H5OH
 F
Nitrobenzene
C6H5NO2
 G
Hexyne
C6H10
 H
2,2-dichloropropane
C3H6Cl2

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This script written by William Reusch, Dept. of Chemistry, Michigan State University. Please send comments and corrections to whreusch@pilot.msu.edu.