Chemistry 130 Spring 2004 Oregon State University
Chemistry 130 Spring 2004 Oregon State University
Exam 2 May 20, 2004 Dr. Richard Nafshun
Mr. Peter Ruiz-Haas
Fill in the front page of the Scantron answer sheet with your last name, first name, middle initial, and student identification number. Leave the class section number and the test form number blank.
This exam consists of 15 multiple-choice questions. Each multiple-choice question has five points associated with it. Select the best multiple-choice answer by filling in the corresponding circle on the rear page of the answer sheet.
1. Consider the following unbalanced redox equation which takes place in acid:
Mn7+ (aq) + C2H2O4 (aq) ---> Mn2+ (aq) + CO2 (g). Which of the following statements is false?
(a) Mn is being reduced.
(b) Mn7+ is losing electrons
(c) C2H2O4 is being oxidized
(d) The oxidation number of C in CO2 is + 4
(e) This is a redox reaction
- is:
(a) A primary alcohol.
(b) A secondary alcohol.
(c) A secondary ester
(d) A tertiary alcohol
(e) a carboxylic acid
- The reaction below between a ketone and alcohol produces a hemiketal and a ketal. Which of the following are the products of the reaction?
(a)
(b)
(c)
(d)
(e) none of the above
4. The following species
produced from the reaction:
(a) is less toxic than the reactant
(b) has a lower boiling point than the reactant
(c) has been oxidized
(d) has a greater solubility than the reactant
(e) is an amide
5. The testosterone molecule is shown below. Testosterone contains:
(A) an ether and an ester.
(B) an alcohol and ester.
(C) an aldehyde and a ketone.
(D) a carboxylic acid and an ester.
(E) an alcohol and a ketone.
6. The pH of blood plasma is 7.4. Therefore, blood plasma is:
(a) basic
(b) neutral
(c) acidic
7. Consider the combustion of glucose to form carbon dioxide (not balanced). Which of the following statements is TRUE?
C6H12O6 + O2 → CO2 + H2O
(a) Carbon is losing electrons
(b) O2 is losing electrons
(c) Carbon is being reduced
(d) Hydrogen is being oxidized
(e) Oxygen is being oxidized
8. Consider the amine functional group. Which of the following statements is TRUE?
(a) an acid
(b) unreactive
(c) a base
(d) aliphatic
9. Which of the following statements is true?
(a) a chiral molecule is not superimposable on its mirror image
(b) glycine (Gly) is an amino acid which only has 1 chiral carbon
(c) all amino acids are chiral
(d) a chiral carbon has 3 identical groups bound to it
(e) the following molecule is chiral:
10. The following is the structure of galactose. Which of the following statements is false:
(a) The structure shows L- galactose
(b) Galactose is an aldohexose
(c) Galactose has 4 chiral carbons
(d) It can form hemiacetals with alcohols
(e) It is an aldehyde
11. When a carboxylic acid and an amine react in a condensation reaction:
(A) an amine is produced.
(B) an alkene is produced.
(C) an amide is produced.
(D) an ether is produced.
(E) an ester is produced.
12. Which of the following is an example of primary structure?
(A) Phe-Phe-Tyr-Tyr-Ser-Ser.
(B) alpha helix.
(C) asparagine.
(D) aldohexose.
(E) CH3CH2COOH..
13. The lock and key model is often used to describe:
(a) primary structure
(b) beta sheet
(c) enzymes
(d) reduction and oxidation (redox)
(e) pH
14. Methyl salicylate (the compound that smells like wintergreen) contains:
(A) an alcohol and a ketone.
(B) an alcohol and an ether.
(C) an alcohol and an ester.
(D) an alcohol and an amide.
(E) an alcohol and an aldehyde.
15. Considering amino acids, which of the following statements is FALSE?
(A) Amino acids have the ability to link together and form proteins.
(B) Amino acids have carboxylic acid groups
(C) Amino acids have a base and an acid in the same molecule
(D) There are about 20 amino acids each of which has a different sidechain that yield
different properties.
(E) All of the amino acids are nonpolar.