7. Draw the structural formula for each of the following compounds:
(a) trans-2-hexene
(b) cis-2,3-dichloro-2-butene
(c) 1-methylcyclopentene
(d) trans-1,2-dibromocyclohexane
(e) 4-ethyl-1-octene
(f) 3-hexyne
(g) cis-diiodoethylene
(h)2-methyl-2-butene
(i)2-bromo-1,3-butadiene

8. Draw all the possible structural isomers of C5H1o. Give the systematic name for each isomer.

9. Which isomer in Problem 8
(a) contains no geometric isomers?
(b) has no double bonds?
(c) has the highest boiling point?
(d) contains geometric isomers, but no double bonds?

10. Write the structural formulas of
(a) five different, simple alkanes;
(b)five different, simple alkenes (only one double bond);
(c) five different, simple alkynes (only one triple bond);
(d) five different, simple cycloalkanes (only one ring).

Show that they conform to the general formulas CnH2n+2,CnH2n,CnH2n-2,and CnH2n, respectively.