Chapter 25 Practice Test Flashcards
What is the name of the alkane represented by the zig-zag structure?
butane
Which statement related to alkanes is not correct?
An electron density within an alkane molecule does not necessarily affect other neighboring molecules.
Which statement about carbon is not correct?
There are only a few elements that are more frequently used in various molecules than the element carbon.
Which statement about tetrahedral geometry is not correct?
All of the bonding angles in a tetrahedral geometry are 120°.
Which statement about hydrocarbons is not correct?
Alkanes, alkenes, and alkynes all contain at least one pi bond.
Which statement about alkene isomers is not correct?
Alkenes are less reactive than alkanes.
Which statement does not correctly describe a characteristic of a π bond?
The greatest electron density exists along the internuclear axis.
Which statement about alkynes is not correct?
Alkynes have one π and two σ bonds.
Look at the two pairs of alkene isomers. Which statement about these isomers is not correct?
1-butene and 2-butene are enantiomers.
Figure 2 is a shorthand version of Figure 1. Both figures represent thalidomide. Which statement about these figures is not correct?
Any bonds that are missing can be assumed to be double bonds between C and H.
Which statement about the two pentane isomers is not correct?
The two isomers are stereoisomers.
Which statement about enantiomers is not correct?
Enantiomers are superimposable.
Look at the four aromatic hydrocarbons. Which statement about aromatic hydrocarbons is not correct?
Aromatic hydrocarbons need a minimum of two π bonds in order to have their unique stability.
Which statement about aromatic hydrocarbons is not correct?
Aromatic hydrocarbons are less stable than alkenes.
Which of the following does not happen when bromine reacts with benzene via the use of a catalyst?
Two bromine atoms are incorporated into the molecule.
Which statement about aromatic hydrocarbon nomenclature is not correct?
The largest amount of substituent separation occurs on a meta-aromatic hydrocarbon.
Which statement about functional group nomenclature is not correct?
The molecule shown in the drawing is methyl dibutyl ether.
Which statement about the effect of hydrogen bonding on the boiling point of a substance is not correct?
The effect of the van der Waals forces in ethanol is significantly greater than for diethyl ether.
Look at the two propanol molecules. Which statement about these molecules is not correct?
In alcohol molecules with three or fewer carbons, the location of the OH group must be specified.
Which statement about carbonyls and carbonyl function groups is not correct?
Ketones have two carbon atoms attached to the oxygen atom in a carbonyl.
Which statement about nomenclature of functional groups is not correct?
This molecule is a ketone known as 4-hexanone.
Look at the two oxidation reactions. Which statement about the formation of aldehydes or ketones is not correct?
In both reactions, a π bond is broken as a result of the oxidation event.
Which statement about polymers is not correct?
Homopolymers are generally larger than heteropolymers.
The drawing shows the synthesis of polyethylene. Structure 1 shows the individual monomers (four total), while Structure 2 shows the polymer polyethylene.
Which statement about this synthesis reaction is not correct?
In polyethylene, a σ bond links each monomer. This σ bond is made by the breaking of a σ bond in the original, separate ethylene molecules.
Which statement about the synthesis of a polymer is not correct?
A polymer has an activator molecule on one end and a terminator molecule on the other end. The actual terminator atom is usually a carbon atom.
