Chapter 25 Test

Question 1

What is the name of the alkane represented?

Answer 1

propane

Question 2

Which of the following shows the alkanes in correct order from lowest to highest boiling points?

Answer 2

methane, ethane, propane, butane, pentane, hexane

Question 3

Which statement about an instantaneous dipole is not correct?

Answer 3

When a molecule has an excess of electrons on one side, the neighboring molecules do not necessarily shift their electrons accordingly.

Question 4

Which statement about molecules is not correct?

Answer 4

The greater the dipole (moment), the less the attraction between molecules.

Question 5

Which of the following shows the alkene known as propene?

Answer 5

Question 6

Which statement about cis and trans alkene isomers is not correct?

Answer 6

All alkenes exist as cis-trans isomers.

Question 7

Which alkyne structure is incorrectly drawn?

Answer 7

propyne

Question 8

Which answer choice correctly shows 3-hexyne?

Answer 8

Question 9

Look at the pair of stereoisomers. Which statement about these stereoisomers is not correct?

Answer 9

The two stereoisomers are enantiomers.

Question 10

Look at the two butanol isomers. Which statement about these isomers is not correct?

Answer 10

The isomers are superimposable.

Question 11

Look at the pair of stereoisomers. Which statement about these stereoisomers is not correct?

Answer 11

The two molecules are mirror images.

Question 12

Which statement about thalidomide is not correct?

Answer 12

The two molecules are superimposeable.

Question 13

Which statement about the aromatic hydrocarbons shown is not correct?

Answer 13

Phenol is a benzene molecule with a hydroxy group attached.

Question 14

Look at another representation of bonding in benzene. Which statement about the bonding is not correct?

Answer 14

The best representation is shown on the bottom, with the six p orbitals in a ring.

Question 15

Which of the following does not happen when you break a π bond in benzene?

Answer 15

The molecule is still aromatic.

Question 16

Which statement about aromatic hydrocarbons is not correct?

Answer 16

If benzene were able to react with bromine via an addition reaction, it would still be aromatic.

Question 17

Which statement about alcohols is not correct?

Answer 17

Alcohols contain nitrogen.

Question 18

Look at the following weak acid-weak base general reaction.

Which statement about this reaction is not correct?

Answer 18

Overall, the reactants are at a lower potential energy than the products.

Question 19

What is the effect of hydrogen bonding on boiling points for substances?

Answer 19

The stronger the hydrogen bonding, the higher the boiling point.

Question 20

Which of the following structures represents the aldehyde butanal?

Answer 20

Question 21

Which statement about the oxidation reaction is not correct?

Answer 21

An aldehyde molecule is formed by this oxidation event.

Question 22

Look at the reaction in the diagram. Which statement about this reaction is not correct?

Answer 22

This is an oxidation event.

Question 23

Which statement about monomers is not correct?

Answer 23

A monomer consists of a chain of smaller molecules that are all identical.

Question 24

Look at the synthesis of polystyrene. Which statement about this synthesis event is not correct?

Answer 24

The monomer for this synthesis reaction is polystyrene.

Question 25

Which statement about polymer synthesis is not correct?

Answer 25

The presence of the initiator and terminator units strongly affects the properties of the polymer.