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CHEMISTRY FINAL EXAM
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1
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SIMPLE CHOICE QUESTIONS. THERE IS ALWAYS JUST ONE CORRECT ANSWER.
USE BLUE PEN BUT NO PENCIL. USE „X” TO INDICATE THE CORRECT ANSWERS ON THIS
SHEET. ONLY ANSWERS GIVEN ON THIS SHEET ARE CONSIDERED FINAL ANSWERS.
NO CORRECTIONS ARE ALLOWED ON THIS SHEET.
General Chemistry – Module 1
1. Which equation is not balanced CORRECTLY?
A. C7H16 + 15O2 → 7CO2 + 8H2O
B. 2Al2O3 → 4Al + 3O2
C. 4Fe3O4 + O2 → 6Fe2O3
D. 3 AgNO3 + (NH4)3PO4 → Ag3PO4 + 3NH4NO3
E. K2CrO4 + Pb(NO3)2 → 2KNO3 + PbCrO4
2. Which of the following combinations of quantum numbers is NOT allowed?
A. n = 2, l = 1, ml = -1, ms = +1/2
B. n = 3, l = 2, ml = -2, ms = +1/2
C. n = 4, l = 2, ml = 2, ms = -1/2
D. n = 3, l = 1, ml = -1, ms = -1/2
E. n = 3, l = 3, ml = -1, ms = +1/2
3. Which statement is FALSE for ionization energy?
A.
B.
C.
D.
E.
are high for noble gases
increases going down in the groups
are always positive
are small for metallic elements
generally increase across the periods
4. Which of the following molecules are non-polar?
A. H2O
B. NH3
C. SO2
D. CO2
E. HCl
5. Which series contains example to all the possible forces (molecular, covalent, ionic and metallic) between the
particles in crystalline solids?
A.
B.
C.
D.
E.
sucrose, mercury, diamond, magnesium-oxide
aluminum, sodium-chloride, quartz, copper-sulphate
ice, calcium-oxide, silver, potassium
sulfur, copper, iodine, gold
magnesium-oxide, silicon-oxide, calcium-chloride, ice
6. The solubility of carbon dioxide in water increases, if…
A. the temperature of water is increased.
B. the liquid is stirred continuously.
C. a catalyst is applied.
D. the gas is dissolved in water with twice as much of volume.
E. the pressure of CO2 is increased.
7. If the absolute temperature of a gas is doubled and the pressure of the gas is halved, how will the volume
change?
A.
B.
C.
D.
E.
It will increase by two times its original value.
It will decrease to one fourth of its original value.
It will stay the same as its original value.
It will increase by four times its original value.
It will decrease to half of its original value.
8. Which solution has the highest boiling point out of solutions of the following compounds of the same
molality?
A. KBr
B. AlCl3
C. CH3COONa
D. NaNO2
E. Mg(NO3)2
9. How many dm3 of hydrogen gas are formed at STP from 11.5 g of sodium (23.0 g/mole) in the following
reaction (assume the use of an excess of water):
2 Na + 2 H2O → 2 NaOH + H2
A. 5.6 dm3
B. 11.2 dm3
C. 16.8 dm3
D. 22.4 dm3
E. 44.8 dm3
10. The following reaction is exothermic for the forward reaction: CO(g) + 2 H2(g)
CH3OH (g)
The yield of methanol (CH3OH) will increase (ie. equilibrium is shifted to the forward direction), if
A. a catalyst is used.
B. the temperature is increased.
C. the temperature is kept constant.
D. the pressure is increased.
E. the CO(g) is decreased.
11. What is the pH of 0.01M NaOH solution (assume full dissociation).
A. 2.0
B. 12.0
C. 1.3
D. 13.0
E. 13.3
12. Strong acid is added to a buffer solution that contains a weak acid (HA) and its conjugate base (A-). Which
of the following statements is FALSE?
A. The pOH of the solution is decreased.
B. The pH of the solution decreases.
C. The concentration of A- decreases.
D. The concentration of HA increases.
E. The H+ concentration of the solution is increased.
13. Which one of the following reactions has a positive entropy change?
A. H2O(g) → H2O(l)
B. B2H6(g) + 6 Cl2(g) → 2 BCl3(g) + 6 HCl(g)
C. CO2(g) + 2 H2O(g) → CH4(g) + 2 O2(g)
D. 2SO2(g) + O2(g) → 2SO3(g)
E. N2(g) + 3H2(g) → 2NH3(g)
14. Given the following information, which of the statements is TRUE?
Cu2+ (aq) + e-  Cu+(aq)
E˚red= + 0.34V
+
2H (aq) + 2e-  H2(g)
E˚red= + 0.0V
Fe2+(aq) + 2e-  Fe(s)
E˚red= - 0.44V
A.
B.
C.
D.
E.
Cu+ (aq) is the strongest oxidizing agent.
Fe2+ (aq) is the strongest oxidizing agent.
Fe(s) is the strongest oxidizing agent.
H+(aq) is the strongest oxidizing agent.
Cu2+(aq) is the strongest oxidizing agent.
Organic Chemistry – Module 2
15. Which of the following molecules has four stereoisomers?
A.
B.
C.
O
H
CH3
H
CH3
Br
D.
CH3
CH2CH3
H
Cl
E.
CO2-
COOH
Br
H
OH
H
H
OH
+
H3N
H
CH3
COOH
CH2CH3
16. Which of the following molecules is chiral?
A. 2-methylpentane
B. 2,2-dimethylbutane
C. 3-ethyloctane
D. 3-methylheptane
E. 4-propylnonane
17. What is the IUPAC name of the following compound: H3C-CH2-CH(-CH2-CH3)-CH(-CH3)-C(-CH3)3?
A. 3-Ethyl-4,5,5-trimethylhexane;
B. 4,5,5-trimethyl-3-ethylhexane;
C. 2,2,3-trimethyl-4-ethylhexane;
D. 1,1,1,2-tetramethyl-3-ethylpentane;
E. 4-ethyl-2,2,3-trimethylhexane.
18. Which of the following compounds CANNOT form H-bonding?
A. β-carotene
B. ethanolamine
C. salicylic acid
D. D(+)-glyceraldehyde
E. aniline
19. Which is the CORRECT order of decreasing boiling point for the following compounds?
A.
B.
C.
D.
E.
propane > 1-propanol > propanal > propanoic acid
propanoic acid > propanal > 1-propanol > propane
1-propanol > propane > propanal > propanoic acid
propanoic acid > 1-propanol > propanal > propane
propanal > propanoic acid > 1-propanol > propane
20. Which of the followings represents toluene?
A.
B.
C.
D.
21. Which of the following compounds is NOT an ether?
A. ethylene oxide
B. benzepoxide
C. 1,4-dioxane
D. thiophene
E. tetrahydrofuran
E.
22. What is the mechanism for the chlorination of benzene?
A.
B.
C.
D.
E.
elimination
electrophilic substitution
nucleophilic addition
nucleophilic substitution
electrophilic addition
23. Which of the following processes involves Schiff’s base formation?
A.
B.
C.
D.
E.
formation of covalent bond between the retinal and opsin molecules
disulfide bridge formation
acylation of primary aliphatic amines
conservation of biological samples by ethanol
reaction of primary aromatic amines react nitrous acid
24. Which of the followings represents the structure of pyrrole?
A.
B.
C.
D.
E.
25. Which statement is CORRECT?
A.
B.
C.
D.
E.
Hydroquinone is an oxidizing agent.
Quinones are aromatic compounds.
Vitamin K is a derivative of 1,4-naphtoquinone.
Hydroquinone is a carbonyl compound.
Hydroquinones contain cumulated double bonds.
26. Which of the following compounds is NOT a neurotransmitter?
A.
B.
C.
D.
E.
dopamine
parathion
serotonin
norepinephrine
acetylcholine
27. Choose the strongest carboxylic acid of the following molecules!
A. butyric acid
B. trichloroacetic acid
C. succinic acid
D. formic acid
E. palmitic acid
28. The common name for 1,2-benzenedicarboxylic acid is…
A. benzoic acid
B. creatine
C. phthalic acid
D. salicylic acid
E. picric acid
Bioorganic Chemistry – Module 3
29. Which of the following formulas corresponds to tyrosine?
A.
B.
C.
D.
E.
30. Which of the following sets of amino acids have nonpolar side chain exclusively?
A.
A.
B.
C.
D.
alanine, proline, methionine, cysteine
tryptophan, histidine, threonine, valine
tyrosine, leucine, lysine, phenylalanine
asparagine, glutamine, phenylalanine, proline
leucine, tryptophan, valine, methionine
31. Which of the following amino acids has the lowest isoelectric point?
A. phenylalanine
B. serine
C. lysine
D. aspartate
E. glutamine
32. Which bonds are NOT involved in the stabilization of tertiary structure of proteins?
A. electrostatic bonds
B. London dispersion forces
C. hydrogen bonds
D. disulfide bonds
E. esther bonds
33. Which one of the following is an example of peptide hormone?
A. testosterone
B. glucagon
C. epinephrine
D. pyridoxine
E. cortisol
34. Choose the structure of D-ribose!
A.
H
H
HO
H
H
O
C
C* OH
C* H
C* OH
C* OH
CH2OH
B.
H
O
C.
H
O
C
C
HO C* H
*
H C OH
HO C* H
H C* OH
H C* OH
*
*
H C OH
H C OH
CH2OH
CH2OH
D.
CH2OH
C O
HO C* H
H C* OH
*
H C OH
CH2OH
E.
H
H
HO
HO
H
O
C
C* OH
C* H
C* H
C* OH
CH2OH
35. Which of the followings represent an energy-storing homopolysaccharide?
A. cellulose
B. starch
C. heparin
D. chitin
E. hyaluronate
36. In human cells, glucose has four main fates. Which of the following is NOT one of those fates?
A. Glucose is used to synthetize glycogen.
B. Glucose is converted to acetyl CoA to make body fat.
C. Glucose is converted to lactate.
D. Glucose is transformed into sucrose.
E. Glucose is catabolized to carbon dioxide and water.
37. What molecules are formed in glycolysis from the compound below?
A.
B.
C.
D.
E.
3-phosphoglycerate and phosphoenolpyruvate
2 molecules glyceraldehyde 3-phosphate
fructose 6-phosphate and ATP
1,3 bisphosphoglycerate and pyruvate
glucose 6-phosphate and ATP
38. Which of the following is NOT an intermediate of the citric acid cycle?
A. isocitrate
B. oxalosuccinate
C. fumarate
D. mevalonate
E. malate
39. Which of the following molecules is NOT a lipid?
A. phosphoglycerides
B. steroids
C. prostaglandins
D. bile acids
E. pectins
40. Choose the WRONG statement about cholesterol!
A. It is part of the plasmamembrane.
B. It is the precursor of the major classes of steroids.
C. The chemical structure of cholesterol includes a perhydrocyclopentano-anthracene ring system.
D. The biosynthesis of cholesterol in humans manly occurs in the cytosol of the liver.
E. Bile acids are products of cholesterol metabolism.
41. Choose the structure of guanine!
A.
B.
C.
D.
E.
42. Select the WRONG statement about DNA!
A. DNA chains coil around the same axis to form a right-handed double helix.
B. DNA is a polynucleotide and the nucleotides are linked by 3’,5’-phosphodiester bonds.
C. Adenine pairs with thymine in DNA.
D. The two strands of DNA are held together by hydrogen bonds.
E. The double-stranded DNA contains more purine bases than pyrimidine bases.