Chapter 25 Test Flashcards
What is the name of the alkane represented?
propane
Which of the following shows the alkanes in correct order from lowest to highest boiling points?
methane, ethane, propane, butane, pentane, hexane
Which statement about an instantaneous dipole is not correct?
When a molecule has an excess of electrons on one side, the neighboring molecules do not necessarily shift their electrons accordingly.
Which statement about molecules is not correct?
The greater the dipole (moment), the less the attraction between molecules.
Which of the following shows the alkene known as propene?
Which statement about cis and trans alkene isomers is not correct?
All alkenes exist as cis-trans isomers.
Which alkyne structure is incorrectly drawn?
propyne
Which answer choice correctly shows 3-hexyne?
Look at the pair of stereoisomers. Which statement about these stereoisomers is not correct?
The two stereoisomers are enantiomers.
Look at the two butanol isomers. Which statement about these isomers is not correct?
The isomers are superimposable.
Look at the pair of stereoisomers. Which statement about these stereoisomers is not correct?
The two molecules are mirror images.
Which statement about thalidomide is not correct?
The two molecules are superimposeable.
Which statement about the aromatic hydrocarbons shown is not correct?
Phenol is a benzene molecule with a hydroxy group attached.
Look at another representation of bonding in benzene. Which statement about the bonding is not correct?
The best representation is shown on the bottom, with the six p orbitals in a ring.
Which of the following does not happen when you break a π bond in benzene?
The molecule is still aromatic.
Which statement about aromatic hydrocarbons is not correct?
If benzene were able to react with bromine via an addition reaction, it would still be aromatic.
Which statement about alcohols is not correct?
Alcohols contain nitrogen.
Look at the following weak acid-weak base general reaction.
Which statement about this reaction is not correct?
Overall, the reactants are at a lower potential energy than the products.
What is the effect of hydrogen bonding on boiling points for substances?
The stronger the hydrogen bonding, the higher the boiling point.
Which of the following structures represents the aldehyde butanal?
Which statement about the oxidation reaction is not correct?
An aldehyde molecule is formed by this oxidation event.
Look at the reaction in the diagram. Which statement about this reaction is not correct?
This is an oxidation event.
Which statement about monomers is not correct?
A monomer consists of a chain of smaller molecules that are all identical.
Look at the synthesis of polystyrene. Which statement about this synthesis event is not correct?
The monomer for this synthesis reaction is polystyrene.
Which statement about polymer synthesis is not correct?
The presence of the initiator and terminator units strongly affects the properties of the polymer.
