1.  How many different alkanes with C₆H₁₄ molecular formula can you make ?  Draw their skeletal formulae and name them.

2.  Which is the shortest chain-length alkane to have structural isomers?

3.  Draw all the isomers of C₄H₈ you can think of. Which are cis- and trans- isomers of each other?

4.  Draw skeletal formulae of cis-hex-3-ene and trans-hex-3-ene.

5.  Which of the following molecules has chiral centers, and where are they:

CH₃CH₂CH₂CH­₂CH­₂OH

CH₃CH₂CH(NH₂)CH₃   

CH₃CHClCH₃                                         

CH₃CH(OH)Br

CH₃CH(CH₃)CH(OH)CH(CH₃)CH₂CH₃

6.  Draw the optical isomers of serine,  H₂NCH(CH₂OH)COOH

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