Grade 11 - Chemistry Pre-Unit Test

Which of the following elements do hydrocarbons contain?

• Carbon and oxygen only

• Carbon and hydrogen only

• Carbon, hydrogen, and oxygen

• Nitrogen, phosphorus, oxygen, sulfur, and the halogens

What is true of a saturated hydrocarbon? 

• It has only single bonds.

• It has only double bonds.

• It has no single bonds.

• None of the above.

How many carbon atoms are in a molecule of pentane?

• 3

• 4

• 5

• 6

What is a cycloalkane?

• A cyclic hydrocarbon

• A cyclic hydrocarbon that contains only single bonds

• A cyclic hydrocarbon with at least one alkyl group

• A six-carbon alkane in the shape of a ring

Which of the following is NOT true of alkenes?

• They have at least one double bond.

• They can have a cyclic structure.

• There are no one-carbon alkenes.

• They are saturated.

Why are simple alkynes like ethyne often used as a starting material for manufacturing plastics? 

• Alkynes are never used in manufacturing.

• They have properties that are very different from alkenes, which cannot be used.

• They are insoluble in nonpolar compounds.

• Their triple bond makes them highly reactive.

What is the best name for the molecules shown in the figure? 

• Isomers

• Stereoisomers

• Structural Isomers

• Geometric Isomers

In which way do optical isomers differ?

• In how they react in some biological systems

• In how they react with each other

• In their physical properties

• In their chemical properties

Which of the following best describes the structure of benzene?

• It is a ring structure.

• It is a linear structure.

• It is a ring structure with six carbon atoms.

• It is a ring structure in which electrons are shared by six carbon nuclei.

Which of these is NOT an example of a functional group?

• Halogen

• Hydroxyl

• Ethane

• Ester