Chem Final Ch 18

Which condensed structural formula is known as the propyl group? A) -CH2CH2CH2CH3 B) -CH2CH3 C) -CH2CH2CH3 D) -CH3 E) none of the above

-CH2CH2CH3

How many isomers exist for the alkane whose molecular formula is C4H10? A) 1 B) 2 C) 3 D) 4 E) none

2

Which of the following are correct names for the compound shown in the figure? 1. 1,2-Dibromobenzene 2. 1,3-Dibromobenzene 3. m-Dibromobenzene A) 1 and 2 only B) 1 and 3 only C) 2 and 3 only D) All of 1, 2, and 3 E) None of 1, 2, and 3

2 and 3 only

The prefix "but-" means that the base chain contains how many carbon atoms? A) 2 B) 4 C) 6 D) 8 E) all of the above

4

Name the following alkane CH2-CH2-CH-CH2-CH2-CH3 CH3 CH3 A) 1,3-dimethylhexane B) 4-methylheptane C) 2-propylpentane D) 1-methyl-1-propylbutane E) none of the above

4-methylheptane

How many carbon atoms would be in the compound named chlorobenzene? A) 1 B) 5 C) 6 D) 7 E) none of the above

6

The compound named 2,3-dimethylpentane would have how many total number of carbons? A) 3 B) 5 C) 7 D) 8 E) none of the above

7

Which of the following structural formulas is an isomer to n-hexane?

C-C-C-C C C

Which of the following compounds is an alkyne? A) C2H6 B) C3H6 C) C2H2 D) C5H12 E) none of the above

C2H2

Which of the following compounds will undergo an addition reaction? A) C3H8 B) C2H14 C)C2H6 D) all of the above E) none of the above

C2H4

What will be the major product(s) when C2H4 undergoes an addition reaction with Cl2 A) C2H3Cl B)C2H4Cl2 C)C2H2Cl2 D) all of the above E) none of the above

C2H4Cl2

What are the product(s) of: C2H6+Cl= A)C2H6Cl2 B) C2H4Cl2+H2 C) C2H5Cl+HCl D) all of the above E) none of the above

C2H5Cl+HCl

Which of the following compounds will undergo a substitution reaction? A)C2H14 B)C2H2 C)C2H6 D) all of the above E) none of the above

C2H6

What is the formula for propene? A) C3H8 B) C3H6 C) C3H4 D) C3H3 E) none of the above

C3H6

Which of the following compounds is an alkene? A) C2H6 B) C3H6 C) C4H6 D) C5H12 E) none of the above

C3H6

Which formula represents butane? A)C4H10 B)C3H8 C)C7H16 D)C2H6 E) all of the above

C4H10

Which of the following is the formula for heptane? A)C4H10 B)C3H8 C)C7H16 D)C2H6 E) all of the above Answer: C

C7H16

A straight chain saturated hydrocarbon has eight carbon atoms. Its molecular formula is: A) C8H14. B) C8H16. C) C8H18. D) C8H24. E) none of the above

C8H18

formula of propanoic acid

CH2CH2COOH

Which of the following is not a proper condensed structural formula for a normal alkane? A) CH3CH2CH2CH3 B) CH2CH3CH3 C) CH3CH2CH2CH2CH3 D) CH3CH3 E) none of the above

CH2CH3CH3

The formula of methyl propanoate is

CH3CH2COOCH3-

The formula for ethyl propyl ether is:

CH3CH2OCH2CH2CH3-

Consider the following n-alkanes: CH4, C2H6, C3H8, C4H10 Which of these would you expect to have the highest boiling point? A) CH4 B) C2H6 C) C3H8 D) C4H10 E) all n-alkanes have the same boiling point

CH4H10

Ethyl propanoate is a(n): A) ether. B) carboxylic acid. C) ester. D) ketone. E) none of the above

ESTER

Which of the following statements is FALSE about polymers? A) Several monomer units link together without eliminating any atom or group to form addition polymers. B) During condensation polymerization an atom or group is eliminated. C) Copolymers contain more than one kind of monomer. D) Nylon 6,6 and polyurethane are examples of copolymers. E) none of the above.

Nylon 6,6 and polyurethane are examples of copolymers.

Which of the following groups represents an ester

O R-C-O R

Which of the following functional groups represents a ketone

O R-C-R

which of the following functional groups represents an aldehyde

O R-CH

which compound represents isopropyl alcohol

OH CH3-CH-CH3

Which of the following terms could NOT be applied to the compound CH2=CHCH2CH2OH? A) unsaturated B) an alcohol C) an alkene D) a carboxylic acid E) none of the above

a carboxylic acid

A compound named "propanal" would be classified as an: A) alcohol. B) amine. C) aldehyde. D) ether. E) none of the above

alcohol

Which type of hydrocarbon is classified as being saturated? A) alkanes B) alkenes C) alkynes D) all of these E) none of the above

alkanes

Amines are: A) organic compounds containing nitrogen. B) known for their awful odors. C) named according to the hydrocarbon groups attached to nitrogen. D) based on N with hydrogen groups being replaced by alkyl groups. E) all of the above

all of the above

Hydrocarbons are commonly used for: A) fuel. B) wax. C) fabrics. D) plastics. E) all of the above

all of the above

Which compound below is an alkane? A) C4H10 B) CH3CH2CH3 C)C7H16 D) CH3CH2CH2CH2CH3 E) all of the above

all of the above

Which of the following is an example of a polymer? A) DNA B) protein C) nylon D) plexiglass E) all of the above

all of the above

Name the aromatic compound shown below: A) Phenyl bromide B) Benzyl bromide C) Bromobenzene D) Phenol E) none of the above

bromobenzene

Name the following compound: CH3-CH2-CH2-CH2-O-CH2-CH3 A) butyl ethyl ether B) hexyl ether C) ethyl butylone D) 2-hexone Answer: A

butyl ethyl ether

The combustion of alkanes, alkenes and alkynes produces: A) water and carbon. B) oxygen and hydrogen. C) carbon dioxide and hydrogen. D) hydrogen and water. E) carbon dioxide and water.

carbon dioxide and water

What are the products from the combustion of 2-methyl-3-ethyloctane? A) variety of small hydrocarbons B) carbon monoxide, carbon trioxide and water C) carbon dioxide and water D) carbon monoxide and water E) none of the above

carbon dioxide and water

O Provide the systematic name of the following compound: CH3-C-OH A) ethanoate B) ethanoic acid C) ethanal D) ethanone E) none of the above

ethanoic acid

1-hexene and 1-hexyne are isomers.

false

An ethyl group can be symbolized as -CH3.

false

CH3CH2OCH2CH2CH3- is named 5-pentanol.

false

Combustion reactions always produce water and carbon monoxide.

false

Esters are best known for their awful odors such as that associated with the smell of rotten fish.

false

Hydrocarbon combustion reactions are highly endothermic - they absorb large amounts of heat.

false

Isomerism is very rare in organic compounds.

false

Isomers are compounds with the same structures but different formulas.

false

R— OH is an ether functional group.

false

The compound CH3CH2CH=CHCH3 is named 3-pentene.

false

The compound with the formula CH4 has four possible isomers.

false

The formula of n-octane is: CCCCCC.

false

When an alkene undergoes an addition reaction to form an alkane, a saturated compound has been converted to an unsaturated compound.

false

a polymer is a long chainlike compound containing a random arrangement of organic molecules called monomers

false

alkanes contain double and single bonds

false

and open chain noncyclic hydrocarbon will always have exactly twice as many hydrogen atoms as carbon atoms

false

hydorcarbons contain carbon hydrogen and exygen

false

molecules containing carbon always assume a tetrahedral molecular geometry since carbon forms four bonds

false

organic compounds have to come from living things

false

the study of carbon containing compounds and their reactions is called carbonyl chemistry

false

What is the molecular geometry of the underlined carbon atom in the following compound, ? HC=C-CH3 triple bond A) tetrahedral B) trigonal planar C) linear D) bent E) none of the above

linear

Which is the name of ? C6H14 A) n-butane B) n-hexane C) n-heptane D) n-pentane E) all of the above

n-hexane

Which is the name of ? C5H12 A) n-butane B) n-hexane C) n-heptane D) n-pentane E) all of the above

n-pentane

Which of the following functional groups represents an alcohol? O A) R—CH O B) R —C— R O C) R —C— OH O D) R —C—O R E) none of the above

none of the above

In naming disubstituted benzenes, "1,2" substitution is also known as: A) ortho substitution. B) meta substitution. C) para substitution. D) isomer substitution. E) none of the above

ortho substitution

O name the following compound CH3-C-CH3 A) propanone B) 2-methyl-2-ethanone C) propanal D) isopropanol E) none of the above

propane

Two compounds are considered as isomers if they have the: A) same molecular formula AND different structure. B) same molecular formula AND same structure. C) different molecular formula AND different structure. D) different molecular formula AND same structure. E) same molecular formula OR same structure.

same molecular formula AND different structure.

what is the molecular geometry of the underlined carbon atom in the following compound CH2=CH-CH3 A) tetrahedral B) trigonal planar C) linear D) bent E) none of the above

tetrahedral

Compare a six-carbon open-chain (noncyclic) hydrocarbon alkane, alkene, and alkyne. Which of these compounds would have the fewest number of hydrogen atoms? A) the alkane B) the alkyne C) the alkene D) all of these have the same number of hydrogen atoms E) none of these contain hydrogen atoms Answer: B

the alkyne

What is the molecular geometry of the underlined carbon atom in the following compound,? Ch2=Ch-Ch3 A) tetrahedral B) trigonal planar C) linear D) bent E) none of the above

trigonal planar

Aldehydes and ketones both contain a carbonyl group.

true

Alkanes cannot undergo addition reactions because they do not have a multiple bond.

true

Alkenes and alkynes are unsaturated hydrocarbons.

true

Alkynes are compounds with at least one triple bond.

true

Amines are nitrogen- containing organic compounds.

true

Aromatic compounds contain a benzene ring.

true

As the number of carbon atoms increases in n-alkanes, so does their boiling point.

true

Even though the aromatic ring of the compound benzene can be drawn with alternating single and double bonds, all the carbon to carbon bonds are the same.

true

Isomers have the same molecular formula but have different properties.

true

R—O—R is an ether functional group.

true

The compound CH3NH2 can be classified as an amine.

true

The generic condensed structural formula for carboxylic acids is RCOOH.

true

a noncyclic alkane hyrocarbon containing eight carbon atoms should also contain 18 hydrogen atoms

true

all organic molecules contain carbon but not all carbon compounds are organic compounds

true

an alkane would be considered a saturated compound

true

carbon must always form four bonds in stable compounds

true

it was originally though that organic compounds had to come from living things

true

production of synthetic polymer polyethylene uses and alkene as a starting monomer unit

true