Chapter 10 extra credit e-homework due Monday 8/4!


ANSWERS ARE GIVEN IN BOLD!

Start Date:     29 Jul 2008 at 10:00 AM
Due Date:     5 Aug 2008 at 01:00 AM
Student Access after Due Date:    Yes. View Only
Graded:    Yes

Test Bank, Question 1

Which of the following can participate in hydrogen bonding?

alcohols

carboxylic acids

primary amines

all of the above

Test Bank, Question 2

Which of the following cannot participate in hydrogen bonding?

phenols

tertiary amines

primary amines

secondary amines

Test Bank, Question 3

Rank butane/(CH3CH2CH2CH3), 1-butanol/(CH3CH2CH2OH), and pentane/(CH3CH2CH2CH2CH3) in order of increasing boiling point. (lowest to highest)

butane < 1-butanol < pentane

butane < pentane < 1-butanol

1-butanol < pentane < butane

pentane < 1-butanol < butane

Test Bank, Question 5

Which produce acidic solutions in water?

2º amines

carboxylic acids

both phenols and carboxylic acids

phenols

Test Bank, Question 6

Which lowers the pH when added to water?

methyl amine

methyl alcohol

ethyl alcohol

propanoic acid

Test Bank, Question 7

Which raises the pH when added to water?

methyl amine

methyl alcohol

ethyl alcohol

propanoic acid

Test Bank, Question 8

The molecule responsible for the hot taste of chili peppers is capsaicin. Capsaicin is a phenol because it has _____.

a double bond

an -OH attached to a benzene ring

an amide within its structure

a trans stereochemistry at its double bond

Test Bank, Question 9

The amide containing anti-flea drug Lufenuron is hydrophobic, therefore it dissolves easily in ____.

hair

water

fatty tissue

aqueous solutions

Test Bank, Question 10

When the ester ethyl butanoate (CH3CH2CH2COOCH2CH3) is hydrolyzed under acidic conditions, which compounds are the products?

butanol and ethanoic (acetic acid)

ethyl alcohol and the butanoate ion

butanol and the ethanoate ion

ethyl alcohol and butanoic acid

Test Bank, Question 11

When the ester ethyl butanoate (CH3CH2CH2COOCH2CH3) is hydrolyzed under basic conditions, which compounds are the products?

butanol and the ethanoate ion

butanol and ethanoic (acetic acid)

ethyl alcohol and the butanoate ion

ethyl alcohol and butanoic acid

Test Bank, Question 12

Enantiomers are _____.

nonsuperimposable mirror image isomers

constitutional isomers

different conformations of the same compound

nonmirror image stereoisomers

Test Bank, Question 13

Diastereomers are _____.

constitutional isomers

different conformations of the same compound

nonmirror image stereoisomers

nonsuperimposable mirror image isomers

Test Bank, Question 15

Which has a chiral carbon atom?

2-pentanol

3-pentanol

1-pentyl amine

1-pentanol

Test Bank, Question 20

Carboxylic acids, when compared with other molecules of similar size, _____

have relatively lower melting points.

have less numbers of hydrogen bonds.

have more nonpolar locations.

have relatively higher boiling points.

Test Bank, Question 23

What is the IUPAC name for the anion produced when propanoic acid dissociates?

propaneolic ion

propanoate ion

propane ion

propanoic ion

Test Bank, Question 24

Phenols are organic acids, as are carboxylic acids. The difference is _____.

the carboxylic acids are significantly stronger

the phenols have a Ka that is larger than the carboxylic acids

the phenols are much stronger acids

the carboxylic acids are much larger than are the phenols

Test Bank, Question 25

The chapter refers to physiological pH, which is approximately a _____.

pH of 7

pH of 8

pH of 10

pH of 6.3

Test Bank, Question 28

Carboxylic acids and alcohols can react under acidic conditions _____.

to produce phenols, if the appropriate hydrolyzing agents are present

to produce esters with water being formed

only if the carboxylic acid is an extremely strong acid

to produce compounds that exist only under acidic conditions

Test Bank, Question 34

What is the product if butanoic acid reacts with ammonia?

the ammonium salt

a cyclic compound with one nitrogen and four carbons in the ring

a secondary amine

a butane compound with a nitrogen attached to each carbon

Test Bank, Question 37

Which class of compounds is generally the most acidic in water?

amines

alcohols

carboxylic acids

phenols

Test Bank, Question 38

To which class of compounds would a physiological stimulant most likely belong?

carboxylic acids

amines

phenols

alcohols

Test Bank, Question 39

An amide can be identified by noting that _____.

a nitrogen attaches to a carbonyl carbon.

all of the carbon chains attach to a nitrogen.

there is a nitrogen incorporated in the structure.

there is a nitrogen attached to an oxygen from a carbon.

Test Bank, Question 42

Stereoisomers are compounds that _____.

have the same molecular formula, but have parent chains of different lengths.

have the same molecular formula, but different three dimensional structures.

have structures that are dependent on the number of carbons with double bonds.

have two different molecular formulas, but look very much the same.

Test Bank, Question 43

Chiral carbon atoms must have what number of different groups attached?

3

2

4

All must be the same.

Test Bank, Question 46

A pair of isomers are determined to be enantiomers. That means they _____.

have different atomic connections.

have two or more atoms that have different groups attached.

cannot be superimposed.

can be superimposed.

Test Bank, Question 47

Which statement is true of a racemic mixture?

There is an equal concentration of cis and trans isomers.

One isomer is achiral, the other is chiral.

The net rotation of plane-polarized light will be zero.

The rotation of plane-polarized light cannot be determined.


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