7. In which of the following are carbon-carbon bond lengths arranged in the correct order?
Longest Shortest
a. cyclohexane benzene ethene
b. cyclohexane ethene benzene
c. ethene benzene cyclohexane
d. benzene ethene cyclohexane
e. None of the above is correct; all carbon-carbon bonds in all compounds are the same length.
8. Which of the following compounds is m-chlorotoluene?