CHEM 120 EXAM 2 Questions with Answers.

CHEM 120 Exam 2


Questions 1-4 refer to the following structures

1. Which of these compounds is an carboxylic acid?

2. Which of these compounds is an ketone?

3. Which of these compounds is an ester?

4. Which of these compounds is an aldehyde?

5. Pick the name for the following structure that is correct.
A) 1,2-dichlorobenzaldehyde
B) 3,4-dichlorobenzaldehyde
C) 3,4-dichlorobenzenaldehyde
D) 1,2-dichlorobenzenaldehyde
E) 3,4-dichlorophenylaldehyde




6. Which of the following structures is a hemiacetal derived from an aldehyde?

7. For the following reaction, which of the following changes would shift the
equilibrium to the right? Mark all that apply.
CH3CH=CH2 + H2O  CH3CHOHCH3 + heat
A) Using a larger reaction flask
B) Decreasing the amount of CH3CHOHCH3
C) Decreasing the amount of CH3CH=CH2
D) Decreasing the amount water
E) Increasing the amount of water

8. The best name for the compound given is
A) 2,4-diethyl-2-methylpentane
B) 3,3,5-trimethylheptane
C) 2-ethyl-4,4-dimethylhexane
D) 3,3-dimethyl-4-ethylhexane
E) 3,3,5-trimethyloctane

, 9. Which is a structural isomer of 3-ethyl-3-methyl-1-hexene?
A) 3,4-dimethyl-3-heptene
B) 3-ethyl-3-methylhexane
B) 3,3-diethylpentane
C) 2,4-dimethylheptane
D) 3-ethyl-3-methyl-1-heptene

10. Hemiacetals are usually not stable and revert to the alcohol and the aldehyde or ketone
they were made from. Which of the following hemiacetals would be the most stable?




11. Which of the following polysaccharides contains 𝛼-1,4-glycoside linkages? Mark all that
apply
A) amylose
B) amylopectin
C) maltose
D) glycogen
E) cellulose

12. Which of the following polysaccharides contains 𝛼-1,6-glycoside branches?
Mark all that apply
A) amylose
B) amylopectin
C) maltose
D) glycogen
E) cellulose

13. Which of the following structures does NOT have isomers with respect to the double bond?




14. Which one of the following structures is different than the others?