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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. Lowest priority group projects into the page
absolute configuration
chiral center
fischer projection
vicinal
2. 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
racemic mixture
enantiomer
carboxylic acid
angle strain
3. 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.
Vinyl
ring strain
molecular orbital
propionaldehyde
4. If a compound is able to rotate plane polarized light.
relative configuration
optical activity
electrophilic addition of H2O
sigma bond
5. Arise from angle strain - torsional strian and nonbonded strain
ring strain
relative configuration
Alkyne
enantiomer
6. One s and two p 120 degree apart
meso compound
polymerization
sp2
diol
7. Nonsuperimposable mirror image of chiral objects - a specific steroisomer.
hydroboration
enantiomer
markovnikov's rule
pi bond
8. Not solvated
pyrolysis
anti conformation
aprotic solvent
Alkane nomenclature
9. Compounds with halogen
Haloalkane
aprotic solvent
diol
combustion - disproportionation - free - radical substitution - pyrolysis
10. A = observed rotation / concentration * length
specific rotation
hydroboration
markovnikov's rule
carboxylic acid
11. Methyl are 60 degrees apart. kinda stable
gauche conformation
carboxylic acid
alkyne
cold potassium permanganate
12. In which one or morehydrogen atoms are replaced with a halogen atom. via free radical substitution
Combustion
ozonolysis
halogenation
eclipsed conformation
13. Two hydroxyl groups
initiation propagation termination
propionaldehyde
nonbonded strain
diol
14. O3
chiral center
oxidizing
isomer
ozonolysis
15. Rotations cancel each other out therefore no optical activity
torsional strain
racemic mixture
nucleophile
Combustion
16. Refers to the =CH2 group
quantum numbers
vicinal
methylene
achiral
17. Carbon double bonded to an oxygen
carbonyl
allyl
relative configuration
Vinyl
18. Palladium or barium sulfate (BaSO4) with quinoline. occur on metal surface - make cis.
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19. N - l - ml - ms
C3H8 + 5O2 = 3CO2 + 4H2O + heat
quantum numbers
propionaldehyde
electrophilic addition of HX
20. 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
catalytic hydrogenation
torsional strain
structural isomers
Combustion
21. Three different substitutents often have plane of symmetry. and rotation of 180 will allow molecule to be superimposed on mirror image
pi bond
achiral
aldehyde
relative configuration
22. Steps of free radical substitution
vicinal
conformational isomer
initiation propagation termination
primary carbon
23. One s and three p orbitals
sp3
electrophilic addition of free radicals
Combustion
Acetylene
24. Goal is to produce most stable carbocation
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25. Always receive number one. contain carbonyl and OH group - very oxidized. highest priority functional group.
halogenation
angle strain
carboxylic acid
enantiomer
26. Sharing of electron between atoms
acetaldehyde
electrophilic addition
formaldehyde
covalent bond
27. What is produced when o3 with lialh4 or nabh4
alkyne
saturated hydrocarbon
alcohol
vicinal
28. A radical transfers a hydrogen atom to another radical and makes an alkane and alkene
disproportionation
configuration
chiral
electrophilic addition of X2
29. Highest energy no separation. or 120 separation.
eclipsed conformation
reducing
anti conformation
Alkyne
30. Alkenes oxidzed with kmno4 - if made with cold - dilue - make OH on each side of double bond - diols or glycol in syn orientation
polymerization
markovnikov's rule
cold potassium permanganate
sp
31. Functionality is specified by alkoxy- prefix. ROR
electrophile
ethers
oxidation
C3H8 + 5O2 = 3CO2 + 4H2O + heat
32. What are the best leaving groups?
acetaldehyde
configuration
Alkane nomenclature
weak bases
33. Charged - need electrons
electrophilic addition of H2O
ketone
electrophile
aprotic solvent
34. Most similar. same molecule only at different points in their rotation. show them with newmans projections
conformational isomer
geometric isomers
weak bases
electrophilic addition of free radicals
35. When two p orbitals line up in parallel and electron clouds overlap. it exsits over a single bond.
oxidation
sigma bond
halogen
pi bond
36. Formed by mixing different types of orbitals
hybridization
protic solvent
halogen
methylene
37. When boat flips
ozonolysis
y- root - en -x-yne
ring flip
geometric isomers
38. Describes the exact spatial arrangement of groups of atoms independent of other molecules.
absolute configuration
molecular orbital
hot - acidic potassium permanganate
angle strain
39. Carbon carbon triple bonds. Suffix-yne.
gauche conformation
Alkyne
cold potassium permanganate
absolute configuration
40. Diborane add to double bond. boron acts as lewis acid and attaches to less hindered carbon. hydride transferred to adjacent carbon. antimarkonikov - alcohol produced
chiral center
angle strain
electrophile
hydroboration
41. Combustion reaction occurs through a radical process
sigma bond
C3H8 + 5O2 = 3CO2 + 4H2O + heat
electrophilic addition of X2
electrophilic addition
42. Nonterminal alkenes are cleaved to form two molar equivalent of carvoxylic acid ..make keton
mcpba
Combustion
hot - acidic potassium permanganate
ring flip
43. Diol with hydroxyl group on same carbon
geminal
stereoisomers
torsional strain
electrophilic addition of HX
44. Cleaves double bond in half - it only oxidizes the carbon to an aldehyde under reducing conditions. if ozidizing make same product as KMNO4
ozonolysis
geometric isomers
cold potassium permanganate
nucleophile
45. Common name for ethyne
y- root - en -x-yne
Acetylene
eclipsed conformation
hybridization
46. 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.
diastereomers
hydroboration
y- root - en -x-yne
saturated hydrocarbon
47. Name for ethanal
fischer projection
Acetylene
acetaldehyde
isomer
48. Object that is not superimposable upon mirror image
electrophilic addition
chiral center
chiral
basicity
49. Propylenes attached to a backbone at the C-3 position. Meaning the double bond at end of the chain and single bonded carbon at rest
electrophile
allyl
catalytic hydrogenation
potassium permanganate
50. When bond angles deviate from ideal values
angle strain
achiral
ring flip
allyl