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Test your basic knowledge |
MCAT Organic Chemistry
Start Test
Study First
Subjects
:
mcat
,
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Not solvated
reducing
Combustion
aprotic solvent
meso compound
2. Iso - neo - cyclo
reducing
mcpba
ring flip
not ignored
3. Describes the exact spatial arrangement of groups of atoms independent of other molecules.
allyl
aldehyde
Acetylene
absolute configuration
4. When bond angles deviate from ideal values
gauche conformation
not ignored
hot - acidic potassium permanganate
angle strain
5. Three different substitutents often have plane of symmetry. and rotation of 180 will allow molecule to be superimposed on mirror image
Alkyne
achiral
C3H8 + 5O2 = 3CO2 + 4H2O + heat
catalytic hydrogenation
6. Nonsuperimposable mirror image of chiral objects - a specific steroisomer.
enantiomer
y- root - en -x-yne
electrophilic addition of HX
halogenation
7. Results when cyclic molecules must assume conformations that have eclipsed interactions
propionaldehyde
torsional strain
Alkane
Alkene
8. Carbon with four different substituents and lack a plane of symmetry
Vinyl
racemic mixture
Alkyne
chiral center
9. How many stereoisomers can a molecule have with n chiral centers
y- root - en -x-yne
ring flip
2^n
electrophilic addition of free radicals
10. Carbon carbon triple bonds. Suffix-yne.
Alkyne
oxidizing
vicinal
primary carbon
11. Spatial arrangement of the atoms or groups of a sterioisomer
configuration
sp
ozonolysis
structural isomers
12. Compounds with halogen
electrophile
Haloalkane
relative configuration
aprotic solvent
13. Reducing an alkene by adding molecular hydrogen to double bond with aid of metal catalyst. e.g. pt - pd - ni. takes place on surface of metal so it does syn addition
reducing
diastereomers
catalytic hydrogenation
sp3
14. Most favorable of staggared conformations
anti conformation
optical activity
formaldehyde
2^n
15. Steps of free radical substitution
carbonyl
stereoisomers
sp
initiation propagation termination
16. Two p orbital form pi and third p orbital combine with s to make two sp hybrid. 180 degree apart
halogen
structural isomers
sp
aldehyde
17. When a molecular orbital is formed head to head or tail to tail. all single bonds are tehese.
enantiomer
sigma bond
specific rotation
potassium permanganate
18. Highest energy no separation. or 120 separation.
saturated hydrocarbon
markovnikov's rule
combustion - disproportionation - free - radical substitution - pyrolysis
eclipsed conformation
19. Results when nonadjacent atoms or groups compete for space. dominant source of energy in flagpole interactions of the boat conformation. thus it goes in various conformations like chair boat and twist.
vicinal
nonbonded strain
torsional strain
electrophilic addition of HX
20. In presence of peroxide - oxygen or ultraviolet light. antimarkonikov because they want a stable free radical. therefore X ends up on least subsituted carbon
electrophilic addition of free radicals
ring flip
oxidation
absolute configuration
21. A molecule with an internal plane of symmetry
meso compound
combustion - disproportionation - free - radical substitution - pyrolysis
saturated hydrocarbon
mcpba
22. Formed by mixing different types of orbitals
Alkyne
not ignored
hybridization
configuration
23. Configuration in relation to another chiral molecule. use it to determine if a molecule is an enantiomer - diastereomer - etc
relative configuration
pyrolysis
enantiomer
peroxycarboxylic acid
24. Ozonolysis under hot acidic kmO4 - e.g. H2O2 condition
gauche conformation
primary carbon
electrophile
oxidizing
25. Charged - need electrons
diastereomers
ketone
electrophile
lindlar's catalyst
26. Hydrocarbon with one or more carbon carbon triple bond
C3H8 + 5O2 = 3CO2 + 4H2O + heat
weak bases
covalent bond
alkyne
27. Name for propanal
propionaldehyde
halogen
ring flip
structural isomers
28. Fast process. double bond is nucleophile and attack x2. make cyclic halonium ion with either br or cl. and make dihalo trans
formaldehyde
electrophilic addition of HX
electrophilic addition of X2
aldehyde
29. If reagent has a bunch of oxygen
ketone
oxidation
relative configuration
Alkane
30. More likely it is to attract positively charged proton. nucleophilic strength decreses: RO->HO>RCO2>ROH>H2O
geminal
Acetylene
basicity
torsional strain
31. Non mirror image of configurational isomers. cis and trans alkenes are them. possible when a molecule has two or more stereogenic centers that differ at some but not alll of the centers. they require multiple chiral centers.
specific rotation
vicinal
saturated hydrocarbon
diastereomers
32. Common name for ethyne
Acetylene
absolute configuration
chiral center
methylene
33. Name for ethanal
propionaldehyde
acetaldehyde
structural isomers
ring strain
34. Always receive number one. contain carbonyl and OH group - very oxidized. highest priority functional group.
electrophile
absolute configuration
carboxylic acid
electrophilic addition
35. One s and two p 120 degree apart
diol
electrophilic addition of H2O
molecular orbital
sp2
36. Nucleus lover. electron rich species that are attracked to charged atoms
nucleophile
oxidizing
molecular orbital
C3H8 + 5O2 = 3CO2 + 4H2O + heat
37. Lowest priority group projects into the page
2^n
weak bases
basicity
fischer projection
38. Contain carbon carbon double bonds. Use same root of alkane but end with 'ene'
Alkene
y- root - en -x-yne
stereoisomers
not ignored
39. No double bonds. it has the maximum number of hydrogens.
Haloalkane
saturated hydrocarbon
weak bases
nonbonded strain
40. Carbon double bonded to an oxygen
hot - acidic potassium permanganate
sp
markovnikov's rule
carbonyl
41. Two hydroxyl groups
relative configuration
Alkane
meso compound
diol
42. Carbonyl located in middle or somewhere in chane. Named with One
initiation propagation termination
aldehyde
ketone
enantiomer
43. M - chloroperoxybenzoic acid
markovnikov's rule
mcpba
Alkane nomenclature
structural isomers
44. Share molecular formula but have different chemical and physical properties
structural isomers
enantiomer
carbonyl
molecular orbital
45. A sigma bond and two pi bonds
Alkane
saturated hydrocarbon
triple bond
electrophilic addition of free radicals
46. Nitrogen containing compound - longest chain attached to nitrogen used in backbone. use e and replace with AMINE. if more complex molecule present - use prefix amino. IF additional group added - use N-
racemic mixture
ionic bond
amines
stereoisomers
47. Sharing of electron between atoms
peroxycarboxylic acid
covalent bond
ring strain
triple bond
48. If a compound is able to rotate plane polarized light.
optical activity
enantiomer
aldehyde
methylene
49. F - CL - Br - I
gauche conformation
eclipsed conformation
geminal
halogen
50. Creation of long - high molecular weight polymer composed of repeating subunit called monomers. occur through a radical mechanism.
primary carbon
vicinal
polymerization
saturated hydrocarbon