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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. A molecule with an internal plane of symmetry
meso compound
anti conformation
Ignored
diastereomers
2. If a compound is able to rotate plane polarized light.
optical activity
peroxycarboxylic acid
methylene
C3H8 + 5O2 = 3CO2 + 4H2O + heat
3. Arise from angle strain - torsional strian and nonbonded strain
pi bond
electrophilic addition of HX
primary carbon
ring strain
4. Carbon double bonded to an oxygen
Combustion
initiation propagation termination
carbonyl
electrophilic addition of free radicals
5. Results when cyclic molecules must assume conformations that have eclipsed interactions
torsional strain
geometric isomers
anti conformation
diastereomers
6. Not solvated
ionic bond
ozonolysis
protic solvent
aprotic solvent
7. 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.
triple bond
sp
electrophilic addition of free radicals
diastereomers
8. Creation of long - high molecular weight polymer composed of repeating subunit called monomers. occur through a radical mechanism.
y- root - en -x-yne
polymerization
initiation propagation termination
molecular orbital
9. Iso - neo - cyclo
carbonyl
chiral center
electrophilic addition of X2
not ignored
10. Differ in position of substitutents attached to a double bond or cycloalkane. Cis or trans or e or z
Alkyne
geometric isomers
ethers
oxidizing
11. What are the best leaving groups?
Acetylene
aldehyde
sigma bond
weak bases
12. Functionality is specified by alkoxy- prefix. ROR
nonbonded strain
ethers
polymerization
electrophilic addition of HX
13. Three different substitutents often have plane of symmetry. and rotation of 180 will allow molecule to be superimposed on mirror image
oxidation
achiral
propionaldehyde
anti conformation
14. Occur when a molecule is broken down by heat. used to reduce the avverage molecular weight of heavy oils. c - c - bonds are cleave dand make small chain alkyl radicals that recombine to form different alkanes
hybridization
pyrolysis
enantiomer
halogen
15. Diol with hydroxyl group on same carbon
geminal
relative configuration
electrophilic addition of H2O
alcohol
16. Same chemical formula. same atomic connectivity . different in how atoms are arranged in space
stereoisomers
catalytic hydrogenation
mcpba
absolute configuration
17. Spatial arrangement of the atoms or groups of a sterioisomer
isomer
Acetylene
configuration
Alkane nomenclature
18. Kmno4
sp2
catalytic hydrogenation
markovnikov's rule
potassium permanganate
19. Di - tri - t - sec - n -
ethers
mcpba
Ignored
aprotic solvent
20. Is bonded to only one other carbon atom
propionaldehyde
Haloalkane
relative configuration
primary carbon
21. When bond angles deviate from ideal values
pyrolysis
angle strain
oxidizing
electrophilic addition of HX
22. More likely it is to attract positively charged proton. nucleophilic strength decreses: RO->HO>RCO2>ROH>H2O
sp2
chiral
structural isomers
basicity
23. Name for propanal
configuration
catalytic hydrogenation
Alkane
propionaldehyde
24. Ozonolysis under hot acidic kmO4 - e.g. H2O2 condition
oxidizing
carbonyl
chiral
optical activity
25. Name for ethanal
acetaldehyde
protic solvent
amines
nonbonded strain
26. Two hydroxyl groups
diol
eclipsed conformation
triple bond
vicinal
27. Electrons of pi bond are reactive and easily attacked by molecules that want e pair e.g. electrophiles.
electrophile
specific rotation
absolute configuration
electrophilic addition
28. 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
allyl
anti conformation
diastereomers
y- root - en -x-yne
29. Carbon with four different substituents and lack a plane of symmetry
Alkene
Vinyl
stereoisomers
chiral center
30. 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
propionaldehyde
covalent bond
halogenation
catalytic hydrogenation
31. Refers to the =CH2 group
Alkyne
triple bond
methylene
angle strain
32. Most favorable of staggared conformations
hydroboration
anti conformation
carboxylic acid
electrophile
33. Formed by mixing different types of orbitals
primary carbon
electrophilic addition
lindlar's catalyst
hybridization
34. M - chloroperoxybenzoic acid
anti conformation
ethers
mcpba
ionic bond
35. Always receive number one. contain carbonyl and OH group - very oxidized. highest priority functional group.
angle strain
molecular orbital
oxidation
carboxylic acid
36. Hydrocarbon with one or more carbon carbon triple bond
absolute configuration
alkyne
conformational isomer
reducing
37. Steps of free radical substitution
alcohol
initiation propagation termination
geminal
quantum numbers
38. Sharing of electron between atoms
relative configuration
halogen
geometric isomers
covalent bond
39. Chain of carbons connected by single bonds with hydrogen atoms attached.
mcpba
Alkane
Alkane nomenclature
combustion - disproportionation - free - radical substitution - pyrolysis
40. Y = position of double bond - x is position of triple bond - root is the prefix representing the length of the principal carbon chain
chiral
y- root - en -x-yne
covalent bond
isomer
41. Name for mathanal
formaldehyde
absolute configuration
aldehyde
C3H8 + 5O2 = 3CO2 + 4H2O + heat
42. No double bonds. it has the maximum number of hydrogens.
saturated hydrocarbon
formaldehyde
initiation propagation termination
relative configuration
43. N - l - ml - ms
mcpba
quantum numbers
vicinal
enantiomer
44. Carbonyl located in middle or somewhere in chane. Named with One
Haloalkane
molecular orbital
ketone
Alkane nomenclature
45. Alkenes oxidzed with kmno4 - if made with cold - dilue - make OH on each side of double bond - diols or glycol in syn orientation
achiral
cold potassium permanganate
anti conformation
catalytic hydrogenation
46. How many stereoisomers can a molecule have with n chiral centers
specific rotation
2^n
ionic bond
electrophilic addition of free radicals
47. When a molecular orbital is formed head to head or tail to tail. all single bonds are tehese.
vicinal
sigma bond
Alkane nomenclature
angle strain
48. When two p orbitals line up in parallel and electron clouds overlap. it exsits over a single bond.
Acetylene
pi bond
combustion - disproportionation - free - radical substitution - pyrolysis
formaldehyde
49. Water can be added to alkenes under acidic conditions. make carbocation. ends with alcohol
Acetylene
electrophilic addition of H2O
halogenation
disproportionation
50. Alphabetical order of alkane rxn
quantum numbers
diastereomers
combustion - disproportionation - free - radical substitution - pyrolysis
allyl