Ch 12 & 13

The IUPAC name for CH3—CH2—C(double) C—CH3 is ________. 2-pentyne 1-methylbutyne 3-pentyne 2-propene pentyne

2-pentyne

The balanced equation for the complete combustion of C5H12 will give which of these product(s)? 10CO + 12H2O 5CO2 + 5H2O 5CO2 + 6H2O CO2 only

5CO2 + 6H2O

What is the condensed structural formula of the compound propene? CH3—CH(double)CH2 H3C(double)CH2—CH3 HC(triple) C—CH3 H2C(double)C(double) CH2 CH3—CH2—CH3

CH3—CH CH2

What is(are) the product(s) of the complete combustion of any hydrocarbon? CO2 + H2O CO + H2O CO only H2O only CO2 only

CO2 + H2O

Which of the following compounds is an alkene? pentyne CH3—CH2—CH3 CH3—CH2(triple)CCH H2C(double) CH—CH3 cyclopentane

H2C(double) CH—CH3

Which of the following is true of nonane, C9H20, which has a density of 0.79 g/mL, melts at -51 °C, and boils at 151 °C? Nonane is a gas at room temperature. Nonane does not undergo combustion. Nonane floats on the surface of water. Nonane is soluble in water. Nonane is solid at room temperature

Nonane floats on the surface of water.

Structural isomers are molecules that share the same formula and have ________. a different shape to the molecule identical boiling points the same arrangement of atoms within the molecule the same shape in each molecule a different arrangement of atoms within the molecule

a different arrangement of atoms within the molecule

The compound 1-butyne contains ________. a bromine atom all single bonds a ring structure a triple bond a double bond

a triple bond

An organic compound composed of carbon and hydrogen connected only by single bonds is an ________. aromatic compound alkane alkene alcohol alkyne

alkane

The hydrogenation of an alkene gives a(n) ________. benzene alkyne alkene alkane isomer

alkane

According to the IUPAC convention, alkyl substituents on a hydrocarbon chain should be listed in which order? in order with the substituent having the smallest number of carbons first in order with the substituent having the largest total number of carbons first alphabetical including prefixes in order with the substituent having the largest number of carbons first alphabetical without considering prefixes

alphabetical without considering prefixes

A compound that contains the ring structure of benzene is called a(n) ________. alkyl group cycloalkane hydrocarbon alkane aromatic compound

aromatic compound

The compound below is named ________. cyclohexyne cyclohexane cyclobenzene cyclohexene benzene

benzene

What is the IUPAC name of the compound shown below? 3-hexene trans-3-hexene 3-hexyne cis-2-hexene cis-3-hexene

cis-3-hexene

An unsaturated compound always ________. contains at least one double or triple bond contains a triple bond is a cycloalkane contains only single bonds contains a double bond

contains at least one double or triple bond

The IUPAC name for ethylene is ________. ethane ethanene ethene cycloethane

ethene

Carbon atoms always have how many covalent bonds? one two three four five

four

How many valence electrons does carbon have? one two three four five

four

Hydrocarbons are the primary constituents of ________. - food flavors - fruit juices - disinfectants - fuels - drugs

fuels

A cycloalkane ________. contains - CH3 groups joined by single bonds has two fewer hydrogen atoms than the corresponding alkane always contains a three carbon ring has two fewer carbon atoms than the corresponding alkane

has two fewer hydrogen atoms than the corresponding alkane

The skeletal formula shown is that of ________. butane pentane hexane heptane octane

heptane

What is the mame for a six-carbon continuous-chain alkane? hexane heptane octane nonane decane

hexane

All of the carbon-carbon bonds in benzene are ________. identical composed of only two types, single and double double bonds circular bonds single bonds

identical

What is the name for a one-carbon alkyl substituent? methyl ethyl propyl butyl

methyl

What is the IUPAC name of the nine-carbon continuous-chain alkane? hexane heptane octane nonane decane

nonane

When naming an alkene, the parent chain is the longest carbon chain ________. regardless of whether or not it contains the double bond that contains at least one of the carbon atoms of the double bond that does not contain the double bond that contains both atoms of the double bond that contains a branch

that contains both atoms of the double bond

Some alkenes have geometric (cis-trans) isomers because ________. each of the carbon atoms in the double bond has four different groups attached to it the carbon atoms in the double bond cannot rotate all of the carbon atoms in the compound are rigid and cannot rotate the carbon atoms in the double bond are free to rotate one of the carbon atoms in the double bond has two identical groups attached to it

the carbon atoms in the double bond cannot rotate

When drawing a structural formula, the first step is to draw ________. the functional group the main carbon chain the most highly substituted carbons the substituents the saturated carbons

the main carbon chain

The simplest cycloalkane has ________. two carbon atoms three carbon atoms five carbon atoms one carbon atom four carbon atoms

three carbon atoms

What is the IUPAC name of the compound shown below? 2-pentene cis-3-pentene trans-2-pentene trans-3-pentene cis-2-pentene

trans-2-pentene

An alkyne is an organic compound that contains a ________ bond. triple hydrogen double single

triple