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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. Iso - neo - cyclo
hybridization
achiral
not ignored
2^n
2. Methyl are 60 degrees apart. kinda stable
lindlar's catalyst
gauche conformation
relative configuration
mcpba
3. Fast process. double bond is nucleophile and attack x2. make cyclic halonium ion with either br or cl. and make dihalo trans
disproportionation
isomer
electrophilic addition of X2
vicinal
4. Spatial arrangement of the atoms or groups of a sterioisomer
disproportionation
configuration
oxidizing
torsional strain
5. 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.
structural isomers
enantiomer
geometric isomers
nonbonded strain
6. One s and three p orbitals
sp3
ketone
sp2
combustion - disproportionation - free - radical substitution - pyrolysis
7. More likely it is to attract positively charged proton. nucleophilic strength decreses: RO->HO>RCO2>ROH>H2O
basicity
alkyne
methylene
ring strain
8. Diol with hydroxyl group on same carbon
potassium permanganate
geminal
catalytic hydrogenation
ionic bond
9. Highest energy no separation. or 120 separation.
eclipsed conformation
meso compound
allyl
molecular orbital
10. Creation of long - high molecular weight polymer composed of repeating subunit called monomers. occur through a radical mechanism.
sp3
carbonyl
polymerization
aprotic solvent
11. 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
quantum numbers
allyl
Combustion
carboxylic acid
12. Di - tri - t - sec - n -
Vinyl
enantiomer
Ignored
pi bond
13. E of double bond act as lewis base and react with hydrogen of hx. make carbocation intermediate. use markonikovs rule
electrophilic addition of HX
enantiomer
cold potassium permanganate
catalytic hydrogenation
14. What is produced when o3 with lialh4 or nabh4
alcohol
acetaldehyde
sp
oxidizing
15. Carbonyl located at the end of the chain named by replacing al with e. e.g. butanal
Ignored
conformational isomer
aldehyde
lindlar's catalyst
16. Functionality is specified by alkoxy- prefix. ROR
chiral
protic solvent
ethers
hydroboration
17. Nonterminal alkenes are cleaved to form two molar equivalent of carvoxylic acid ..make keton
hot - acidic potassium permanganate
oxidizing
C3H8 + 5O2 = 3CO2 + 4H2O + heat
Alkane nomenclature
18. Differ in position of substitutents attached to a double bond or cycloalkane. Cis or trans or e or z
chiral
geometric isomers
alkyne
electrophile
19. Common name for ethyne
racemic mixture
C3H8 + 5O2 = 3CO2 + 4H2O + heat
2^n
Acetylene
20. Same chemical formula. same atomic connectivity . different in how atoms are arranged in space
2^n
ketone
electrophilic addition of X2
stereoisomers
21. Y = position of double bond - x is position of triple bond - root is the prefix representing the length of the principal carbon chain
ketone
hydroboration
y- root - en -x-yne
ring flip
22. Use the Greek root for the number of carbons followed by the ending - - ane
alkyne
anti conformation
Alkane nomenclature
Alkyne
23. A sigma bond and two pi bonds
markovnikov's rule
specific rotation
quantum numbers
triple bond
24. No double bonds. it has the maximum number of hydrogens.
markovnikov's rule
hot - acidic potassium permanganate
saturated hydrocarbon
alcohol
25. Rotations cancel each other out therefore no optical activity
racemic mixture
relative configuration
y- root - en -x-yne
pyrolysis
26. Two hydroxyl groups
ionic bond
diol
sp2
configuration
27. In which one or morehydrogen atoms are replaced with a halogen atom. via free radical substitution
halogenation
ring flip
initiation propagation termination
2^n
28. A = observed rotation / concentration * length
pi bond
electrophilic addition of HX
initiation propagation termination
specific rotation
29. Steps of free radical substitution
electrophilic addition of X2
triple bond
initiation propagation termination
Acetylene
30. Results when cyclic molecules must assume conformations that have eclipsed interactions
torsional strain
alcohol
quantum numbers
Alkane nomenclature
31. Carbon with four different substituents and lack a plane of symmetry
sp
chiral center
peroxycarboxylic acid
optical activity
32. Nonsuperimposable mirror image of chiral objects - a specific steroisomer.
acetaldehyde
combustion - disproportionation - free - radical substitution - pyrolysis
formaldehyde
enantiomer
33. 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
aprotic solvent
structural isomers
catalytic hydrogenation
y- root - en -x-yne
34. One s and two p 120 degree apart
mcpba
diastereomers
pyrolysis
sp2
35. When boat flips
weak bases
ring flip
meso compound
ionic bond
36. Most favorable of staggared conformations
anti conformation
Alkene
methylene
protic solvent
37. Arise from angle strain - torsional strian and nonbonded strain
aprotic solvent
electrophilic addition of X2
ring strain
sp3
38. Combustion reaction occurs through a radical process
electrophile
Alkane
C3H8 + 5O2 = 3CO2 + 4H2O + heat
peroxycarboxylic acid
39. Chain of carbons connected by single bonds with hydrogen atoms attached.
stereoisomers
ethers
specific rotation
Alkane
40. Diols with hydroxyl group on adjacent carbon
angle strain
allyl
molecular orbital
vicinal
41. Configuration in relation to another chiral molecule. use it to determine if a molecule is an enantiomer - diastereomer - etc
specific rotation
molecular orbital
relative configuration
Alkene
42. What are the best leaving groups?
halogen
meso compound
Vinyl
weak bases
43. Object that is not superimposable upon mirror image
achiral
chiral
racemic mixture
aldehyde
44. 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
formaldehyde
primary carbon
combustion - disproportionation - free - radical substitution - pyrolysis
enantiomer
45. Electrons of pi bond are reactive and easily attacked by molecules that want e pair e.g. electrophiles.
sigma bond
electrophilic addition
oxidizing
carboxylic acid
46. Palladium or barium sulfate (BaSO4) with quinoline. occur on metal surface - make cis.
47. When two p orbitals line up in parallel and electron clouds overlap. it exsits over a single bond.
structural isomers
triple bond
pi bond
acetaldehyde
48. Two p orbital form pi and third p orbital combine with s to make two sp hybrid. 180 degree apart
fischer projection
sp
Ignored
stereoisomers
49. Sharing of electron between atoms
diol
sp3
absolute configuration
covalent bond
50. O3
nucleophile
enantiomer
ozonolysis
electrophilic addition of HX