Practice Problems

Question: A certain alkane contains 12 hydrogen atoms. Its formula must be A. C3H12 B. C4H12 C. C5H12 D. none of these Answer: C (two for each C, three on the end Cs)

Question: How many different models would you have to assemble to represent all the isomers of C2H2Br2? A. 1 B. 2 C. 3 D. at least 4 Answer: C

Question: Choose the class of hydrocarbons that participaters in the largest variety of reactions: A. alkanes B. alkenes C. alkynes D. all are very unreactive Answer: C

Question: An aromatic compound is characterized by A. an odor B. a high melting point C. a benzene ring D. a double bond Answer: C (although some have fragrances too...)

Question: A certain alkyne contains 8 hydrogen atoms. Its formula must be A. C3H8 B. C4H8 C. C5H8 D. none of these Answer: C (remember a triple bond for an alkyne)

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