Chem V21 - Organic and Biochemistry » Fall 2021 » Hydrocarbons PreLab Quiz

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Question #1
Property of hydrocarbon
A.   nonpolar
B.   polar
Question #2
Temperature at which a solid becomes a liquid
A.   freezing point
B.   melting point
Question #3
Temperature at which a liquid becomes a gas
A.   melting point
B.   boiling point
Question #4
Depends on types of bonds present; provides information about the structure of compound
A.   chemical reactivity
B.   properties
C.   hydrocarbons
Question #5
Choose the hydrocarbon below that you would expect to react most quickly with bromine (Br2)
A.   1,2-dibromobutane
B.   3-heptene
C.   1-methyl-butane
D.   cyclohexane
Question #6
If a hydrocarbon reacts with potassium permanganate, you will see a color change of the potassium permanganate from purple to brown.  When you treated your mystery hydrocarbon with KMnO4, the product was purple.  What can you determine about the identity of your mystery hydrocarbon?
A.   It is not an aromatic.
B.   It is an alkene.
C.   It is not an alkene.
Question #7
Which test will be positive if your mystery hydrocarbon is an aromatic?
A.   Reaction with Potassium Permanganate
B.   Reaction with Chloroform and Aluminum Chloride
C.   Reaction with Bromine
Question #8
Lab Safety: When a reagent produces vapors that may be harmful, you should
A.   only work with it in the fume hood.
B.   take it outside to work with it.
C.   make sure to hold your breath when working with it.

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