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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. Moleculse that have the opposite configuration at their one chiral center. or if multiple chiral centers - must have the opposite configuration at every one of their chiral centers to be enantiomers. identical physical properties and much of the same
electrophilic addition of X2
formaldehyde
enantiomer
geminal
2. Alphabetical order of alkane rxn
combustion - disproportionation - free - radical substitution - pyrolysis
angle strain
anti conformation
mcpba
3. Goal is to produce most stable carbocation
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4. Common name for ethyne
combustion - disproportionation - free - radical substitution - pyrolysis
Acetylene
sigma bond
not ignored
5. Nucleus lover. electron rich species that are attracked to charged atoms
nucleophile
Alkene
Acetylene
catalytic hydrogenation
6. Most favorable of staggared conformations
halogen
electrophile
anti conformation
reducing
7. Results when cyclic molecules must assume conformations that have eclipsed interactions
torsional strain
Alkene
halogen
nonbonded strain
8. M - chloroperoxybenzoic acid
optical activity
formaldehyde
not ignored
mcpba
9. Alkene oxidized with this - strong oxidizing agent. CH3CO3H or mcpba and it makes epoxide or oxirane
ring flip
enantiomer
sigma bond
peroxycarboxylic acid
10. A sigma bond and two pi bonds
covalent bond
torsional strain
ring flip
triple bond
11. In which one or morehydrogen atoms are replaced with a halogen atom. via free radical substitution
halogenation
optical activity
markovnikov's rule
eclipsed conformation
12. Diborane add to double bond. boron acts as lewis acid and attaches to less hindered carbon. hydride transferred to adjacent carbon. antimarkonikov - alcohol produced
nonbonded strain
molecular orbital
electrophilic addition of free radicals
hydroboration
13. Fast process. double bond is nucleophile and attack x2. make cyclic halonium ion with either br or cl. and make dihalo trans
electrophilic addition of X2
oxidation
triple bond
combustion - disproportionation - free - radical substitution - pyrolysis
14. If a compound is able to rotate plane polarized light.
optical activity
weak bases
pi bond
fischer projection
15. When a molecular orbital is formed head to head or tail to tail. all single bonds are tehese.
primary carbon
cold potassium permanganate
lindlar's catalyst
sigma bond
16. Configuration in relation to another chiral molecule. use it to determine if a molecule is an enantiomer - diastereomer - etc
protic solvent
not ignored
relative configuration
aldehyde
17. Creation of long - high molecular weight polymer composed of repeating subunit called monomers. occur through a radical mechanism.
nonbonded strain
polymerization
ketone
electrophilic addition
18. Rotations cancel each other out therefore no optical activity
allyl
chiral center
racemic mixture
ring flip
19. Spatial arrangement of the atoms or groups of a sterioisomer
anti conformation
triple bond
configuration
hydroboration
20. Charged - need electrons
ring strain
alcohol
mcpba
electrophile
21. Name for ethanal
stereoisomers
acetaldehyde
carboxylic acid
Alkane nomenclature
22. How many stereoisomers can a molecule have with n chiral centers
lindlar's catalyst
2^n
Combustion
sp2
23. Combustion reaction occurs through a radical process
combustion - disproportionation - free - radical substitution - pyrolysis
C3H8 + 5O2 = 3CO2 + 4H2O + heat
electrophilic addition of H2O
anti conformation
24. F - CL - Br - I
alcohol
basicity
oxidizing
halogen
25. Nonsuperimposable mirror image of chiral objects - a specific steroisomer.
electrophile
enantiomer
ketone
saturated hydrocarbon
26. Highest energy no separation. or 120 separation.
eclipsed conformation
electrophilic addition of X2
absolute configuration
electrophile
27. Share molecular formula but have different chemical and physical properties
structural isomers
aprotic solvent
optical activity
alcohol
28. Transfer of electrions from one atome to another
ionic bond
vicinal
hybridization
halogenation
29. Describes the exact spatial arrangement of groups of atoms independent of other molecules.
absolute configuration
Alkene
mcpba
Alkane nomenclature
30. 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-
protic solvent
amines
Ignored
vicinal
31. When bond angles deviate from ideal values
electrophilic addition
mcpba
electrophilic addition of free radicals
angle strain
32. Not solvated
sp
aprotic solvent
y- root - en -x-yne
configuration
33. Sharing of electron between atoms
sigma bond
weak bases
covalent bond
specific rotation
34. In presence of peroxide - oxygen or ultraviolet light. antimarkonikov because they want a stable free radical. therefore X ends up on least subsituted carbon
relative configuration
anti conformation
quantum numbers
electrophilic addition of free radicals
35. When two atomic orbitals combine. obtained mathematically by adding or subtracting wave functions. if sings are the same - make bonding - if different - less stable antibonding.
conformational isomer
disproportionation
Alkene
molecular orbital
36. E of double bond act as lewis base and react with hydrogen of hx. make carbocation intermediate. use markonikovs rule
y- root - en -x-yne
ozonolysis
geometric isomers
electrophilic addition of HX
37. Formed by mixing different types of orbitals
racemic mixture
hybridization
geometric isomers
nonbonded strain
38. When boat flips
ring flip
disproportionation
eclipsed conformation
Vinyl
39. Differ in position of substitutents attached to a double bond or cycloalkane. Cis or trans or e or z
geometric isomers
peroxycarboxylic acid
Ignored
diol
40. Always receive number one. contain carbonyl and OH group - very oxidized. highest priority functional group.
carboxylic acid
allyl
basicity
Acetylene
41. Carbonyl located at the end of the chain named by replacing al with e. e.g. butanal
Alkane
amines
achiral
aldehyde
42. Zn/h or CH3/s with ozonolysis
absolute configuration
reducing
C3H8 + 5O2 = 3CO2 + 4H2O + heat
methylene
43. Diols with hydroxyl group on adjacent carbon
halogen
vicinal
sigma bond
not ignored
44. Is bonded to only one other carbon atom
primary carbon
electrophilic addition of X2
ketone
achiral
45. O3
weak bases
C3H8 + 5O2 = 3CO2 + 4H2O + heat
electrophilic addition of H2O
ozonolysis
46. What is produced when o3 with lialh4 or nabh4
electrophilic addition of X2
diol
Ignored
alcohol
47. Kmno4
ethers
diastereomers
potassium permanganate
conformational isomer
48. Compounds with halogen
nucleophile
specific rotation
Haloalkane
halogenation
49. Name for mathanal
formaldehyde
ethers
y- root - en -x-yne
hybridization
50. Methyl are 60 degrees apart. kinda stable
gauche conformation
Combustion
y- root - en -x-yne
meso compound