West Los Angeles College » Chemistry » Chem 051 - Fundamentals of Chemistry » Winter 2021

Chem 051 - Fundamentals of Chemistry » Winter 2021 » Homework Week 5

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Question #1

In the IUPAC name for the following compound, the -Br group is located at what position of the compound shown? CH3CHBrCH=CH2

A. 4

B. 6

C. 3

D. 5

Question #2

Which of the following is NOT a proper IUPAC name?

A. 2-pentanone

B. 3-pentanone

C. 1-pentanone

D. 1-cyclopentanone

Question #3

The vast number of organic compounds is due to the unique chemistry of carbon. This chemistry involves

A. More than one answer is correct.

B. formation of long chains.

C. cyclization.

D. isomerism.

Question #4

The sodium salt of benzoic acid is used as

A. a soap.

B. a flavoring agent.

C. an antacid.

D. a food preservative.

Question #5

Which prefix is used for an isomer in which two similar or identical groups are on the same side of a double bond?

A. trans-

B. prop-

C. cis-

D. but-

Question #6

Identify a difference between alkynes and alkenes.

A. Alkenes are less dense than water, whereas alkynes are denser than water.

B. Alkenes have higher melting and boiling points than alkynes do.

C. Alkenes consume more moles of addition reagent than alkynes do.

D. Alkenes are insoluble in water, whereas alkynes are soluble in water.

Question #7

How many isomers (structural + geometric) exist for dibromocyclopentane (C5H8Br2)?

A. 6

B. 3

C. 5

D. 4

Question #8

Oxidation of a secondary alcohol will produce a(n) ________.

A. aldehyde

B. ketone

C. alkene

D. ether

Question #9

Complete combustion of an alkane produces what products?

A. CO2 and 2O

B. C2 and H2O

C. CO2 and H2O

D. CO and H2O

Question #10

What is the common name for the chemical shown below ? CH3–CH2–CH2–NH–CH2–CH3

A. pentylamine

B. ethylpropylamine

C. aminoethylpropane

D. N-propyl-N-ethylamine

Question #11

Which of the following compounds is a structural isomer of 2-methylbutane?

A. butane

B. 2-methylpropane

C. propane

D. pentane

Question #12

Alkanes react readily with _____ .

A. sodium hydroxide

B. none of the choices

C. sulfuric acid

D. hydrochloric acid

Question #13

What is the name of the potassium salt of m-ethylbenzoic acid?

A. potassium m-ethylbenzoic

B. m-ethyl potassium benzoate

C. potassium m-ethylbenzoic acid

D. potassium m-ethylbenzoate

Question #14

Which of the following is used to represent an organic acid?

A. CHO

B. COOH

C. COH

D. COC

Question #15

Identify the alkyl group that can be derived from the parent alkane CH3CH3.

A. Ethyl

B. Propyl

C. Methyl

D. Butyl

Question #16

Which of the following is the most soluble in water?

A. heptane

B. 1-pentanol

C. pentane

D. 1-heptanol

Question #17

Another acceptable name for 1-ethyl-3-methylbenzene is _____ .

A. o-ethylmethyltoluene

B. m-ethylmethyltoluene

C. p-ethylmethyltoluene

D. m-ethyltoluene

Question #18

Which of the following is a condensed structural formula for an aldehyde? (Note: R is used to represent a generic alkyl chain).

A. RCOH

B. RCOOH

C. RC(=O)R

D. RCHO

Question #19

Which applies to the manner in which carbon bonds in alkanes?

A. The bonds between carbon and other atoms are ionic.

B. The bonds formed by carbon all use p orbitals.

C. Carbon to carbon bonds are expected to be double bonds.

D. The bonds are formed with carbon using an sp3 configuration.

Question #20

All of the members of the alkane series of hydrocarbons have the general formula _____ .

A. CnH2n−2

B. CnHn

C. CnH2n

D. CnH2n+2

Question #21

Identify the correct statement with respect to the oxygen found in an alcohol as compared to the oxygen found in an ether.

A. The oxygen in an ether is found on a side chain and that of the alcohol is not.

B. Oxygen in an alcohol is directly associated with a hydrogen; the oxygen in an ether is not chemically bound to a hydrogen.

C. Oxygen is similar in both compounds as it is always found on a terminal carbon.

D. Oxygen is identical in both these compounds; the difference between them is determined by another factor.

Question #22

Which of the following would be made from an alcohol by a dehydration reaction?

A. alkene

B. alkane

C. alkyne

D. alkyl halide

Question #23

How many isomers (structural + geometric) exist for dichlorocyclopropane (C3H4Cl2)?

A. 5

B. 4

C. 3

D. 6

Question #24

The benzene ring as a branch is called a _____ group.

A. phenol

B. hexyl

C. phenyl

D. benzyl

Question #25

Which of the following alcohols would be the most difficult to oxidize?

A. CH3OH

B. CH3CH(OH)CH2(CH3)2

C. HOCH2CH2OH

D. CH3C(OH)(CH3)2

Question #26

What is the reason why there are so many organic compounds?

A. Carbon atoms can form stable covalent bonds with other carbon atoms.

B. Unlike inorganic compounds, organic compounds can be cyclic.

C. Organic compounds are produced by living things.

D. Organic compounds can be larger than inorganic compounds.

Question #27

Due to the method used for treatment, which of the following might be found in drinking water?

A. formaldehyde

B. chloromethane

C. methyl sulfide

D. bromobenzene

Question #28

According to Markovnikov's rule, when 3-methyl-1-butene undergoes and addition reaction with HCl, the chlorine will end up on which main chain carbon?

A. #2

B. #3

C. #4

D. #1

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