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CHEM 2331 Final Exam UAA Session

Total questions: 25

Worksheet time: 12mins

Name
Class
Date
1.

How many types of chemically distinct hydrogens are in this molecule?

a)

7

b)

4

c)

6

d)

5

2.

How many types of chemically distinct hydrogens are present in this molecule?

a)

6

b)

7

c)

5

d)

8

3.

What heteroatom is most likely present in a compound with this mass spectrum?

a)

Nitrogen

b)

Chlorine

c)

Bromine

d)

Sulfur

4.

A certain molecule has 5 nitrogen atoms. Which of the following numbers could NOT be its molar mass?

a)

445 g/mol

b)

339 g/mol

c)

523 g/mol

d)

438 g/mol

5.

For addition reactions to conjugated dienes, the thermodynamic product corresponds to the less-substituted alkene.

a)

TRUE

b)

FALSE

6.

This reaction is most likely to proceed by which mechanism?

a)

SN1

b)

E2

c)

E1

d)

SN2

7.

CHALLENGE! What is the complex splitting pattern for Hydrogen b (Hb)?

a)

doublet of a doublet of a triplet

b)

triplet of a doublet

c)

doublet of a doublet

d)

triplet of a doublet

8.

The following reaction is an example of:

a)

acidification

b)

saponification

c)

alcoholysis

d)

heterolysis

9.

Which of the following solvents would NOT be appropriate for Step 1 of the reaction shown?

a)

Acetone

b)

DMF

c)

Ethanol

d)

THF

10.

Select the most stable leaving group for the molecule shown.

a)

BrBr^-

b)

ClCl^-

c)

TsOTsO^-

d)

H2NH_2N^-

11.

CHALLENGE! What is the major product for this reaction?

a)
b)
c)
d)
12.

Select all the reversible nucleophiles.

a)

MgBrCH3MgBrCH_3

b)

NaOCH3NaOCH_3

c)

KOHKOH

d)

LiAlH4LiAlH_4

13.

TRUE or FALSE: OHOH^- acts as a leaving group in an Aldol Condensation reaction.

a)

TRUE

b)

FALSE

14.

TRUE or FALSE: A compound that is antiaromatic must be planar.

a)

TRUE

b)

FALSE

15.

BONUS POINTS! Select the correct product for this Aldol Addition reaction.

a)

b)

c)

d)

16.

What is the difference between Hydrogen and Deuterium?

a)

Hydrogen has 1 proton, but Deuterium has none.

b)

Hydrogen has 1 neutron, but Deuterium has none.

c)

Deuterium has 1 electron, but Hydrogen has none.

d)

Deuterium has 1 neutron, but Hydrogen has none.

17.

Select the strongest nucleophile.

a)

CH3OCH_3O^-

b)

CH3NHCH_3NH^-

c)

CH3SCH_3S^-

d)

CH3CH2 CH_3CH_2^{\ -}

18.

How many acetal groups are present in this molecule?

a)

4

b)

3

c)

2

d)

5

19.

How many hemiacetal groups are present in this molecule?

a)

4

b)

3

c)

2

d)

5

20.

By which mechanism does an epoxide open?

a)

SN2

b)

E1

c)

SN1

d)

E1

21.

TRUE or FALSE: Acidity of a compound increases as the pKa number increases.

a)

TRUE

b)

FALSE

22.

Select the term that correctly describes this molecule.

a)

Nonaromatic

b)

Antiaromatic

c)

Aromatic

d)

Something we haven't discussed

23.

Select all the factors that could make the enol form of some molecules favored over the keto form.

a)

Intramolecular hydrogen bonding

b)

Aromaticity

c)

Higher bond energy in enol

d)

Lower bond energy in enol

24.

CHALLENGE! Shown is the disaccharide lactose. Looking at the ring on the left, we can tell that this is the ________ form of lactose.

a)

Cis, β\beta

b)

Trans, α\alpha

c)

Cis, α\alpha

d)

Cis, β\beta

25.

Which of these are recommended study strategies to do your best on the final exam?

a)

Take short breaks while studying to reduce burnout

b)

Review previous exams and homework

c)

Study for the whole night before exam day

d)

Focus most on topics that you find more difficult