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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. M - chloroperoxybenzoic acid
hydroboration
oxidizing
mcpba
primary carbon
2. 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.
quantum numbers
2^n
anti conformation
diastereomers
3. Alphabetical order of alkane rxn
electrophilic addition of X2
ionic bond
combustion - disproportionation - free - radical substitution - pyrolysis
hybridization
4. Cleaves double bond in half - it only oxidizes the carbon to an aldehyde under reducing conditions. if ozidizing make same product as KMNO4
ozonolysis
covalent bond
methylene
basicity
5. E of double bond act as lewis base and react with hydrogen of hx. make carbocation intermediate. use markonikovs rule
electrophilic addition of HX
sp3
angle strain
electrophilic addition of H2O
6. Carbon carbon triple bonds. Suffix-yne.
meso compound
pyrolysis
Alkyne
relative configuration
7. Rotations cancel each other out therefore no optical activity
fischer projection
sp3
racemic mixture
alcohol
8. Combustion reaction occurs through a radical process
C3H8 + 5O2 = 3CO2 + 4H2O + heat
quantum numbers
initiation propagation termination
catalytic hydrogenation
9. 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
alkyne
catalytic hydrogenation
sp3
molecular orbital
10. Most similar. same molecule only at different points in their rotation. show them with newmans projections
sp3
carbonyl
Combustion
conformational isomer
11. 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.
primary carbon
molecular orbital
Alkane nomenclature
oxidizing
12. Most favorable of staggared conformations
structural isomers
anti conformation
propionaldehyde
diol
13. A molecule with an internal plane of symmetry
meso compound
structural isomers
mcpba
hot - acidic potassium permanganate
14. Creation of long - high molecular weight polymer composed of repeating subunit called monomers. occur through a radical mechanism.
weak bases
aprotic solvent
formaldehyde
polymerization
15. Name for mathanal
formaldehyde
halogen
aprotic solvent
diol
16. One s and three p orbitals
sp2
sp3
Acetylene
structural isomers
17. Zn/h or CH3/s with ozonolysis
reducing
electrophilic addition of H2O
y- root - en -x-yne
electrophilic addition
18. Compounds with halogen
Alkene
Haloalkane
alcohol
2^n
19. N - l - ml - ms
quantum numbers
hydroboration
alkyne
not ignored
20. Name for ethanal
ionic bond
basicity
carboxylic acid
acetaldehyde
21. One s and two p 120 degree apart
sp2
oxidizing
carbonyl
diol
22. Methyl are 60 degrees apart. kinda stable
gauche conformation
ozonolysis
acetaldehyde
electrophilic addition of X2
23. Functionality is specified by alkoxy- prefix. ROR
potassium permanganate
lindlar's catalyst
ethers
Vinyl
24. Sharing of electron between atoms
covalent bond
ozonolysis
markovnikov's rule
Vinyl
25. Diol with hydroxyl group on same carbon
ring flip
lindlar's catalyst
methylene
geminal
26. What is produced when o3 with lialh4 or nabh4
diastereomers
C3H8 + 5O2 = 3CO2 + 4H2O + heat
alcohol
catalytic hydrogenation
27. O3
alkyne
carboxylic acid
alcohol
ozonolysis
28. Di - tri - t - sec - n -
triple bond
ozonolysis
Ignored
propionaldehyde
29. Diborane add to double bond. boron acts as lewis acid and attaches to less hindered carbon. hydride transferred to adjacent carbon. antimarkonikov - alcohol produced
specific rotation
aldehyde
hydroboration
primary carbon
30. 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
ring flip
hybridization
pyrolysis
Vinyl
31. Transfer of electrions from one atome to another
combustion - disproportionation - free - radical substitution - pyrolysis
basicity
ionic bond
electrophilic addition of H2O
32. Common name for ethyne
electrophilic addition of HX
2^n
Acetylene
sp
33. Not solvated
vicinal
aprotic solvent
primary carbon
racemic mixture
34. If a compound is able to rotate plane polarized light.
optical activity
electrophilic addition of H2O
geometric isomers
mcpba
35. Two hydroxyl groups
diol
configuration
2^n
nonbonded strain
36. Water can be added to alkenes under acidic conditions. make carbocation. ends with alcohol
eclipsed conformation
weak bases
electrophilic addition of H2O
Haloalkane
37. Arise from angle strain - torsional strian and nonbonded strain
Alkane
reducing
ring strain
electrophilic addition of HX
38. Same chemical formula. same atomic connectivity . different in how atoms are arranged in space
stereoisomers
ionic bond
specific rotation
isomer
39. 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.
nonbonded strain
enantiomer
pi bond
y- root - en -x-yne
40. Fast process. double bond is nucleophile and attack x2. make cyclic halonium ion with either br or cl. and make dihalo trans
disproportionation
oxidation
allyl
electrophilic addition of X2
41. Nonterminal alkenes are cleaved to form two molar equivalent of carvoxylic acid ..make keton
halogenation
disproportionation
hot - acidic potassium permanganate
acetaldehyde
42. Carbon double bonded to an oxygen
electrophilic addition
carbonyl
pi bond
mcpba
43. A = observed rotation / concentration * length
pyrolysis
amines
specific rotation
ring flip
44. Electrons of pi bond are reactive and easily attacked by molecules that want e pair e.g. electrophiles.
geometric isomers
halogen
primary carbon
electrophilic addition
45. Ozonolysis under hot acidic kmO4 - e.g. H2O2 condition
carboxylic acid
ozonolysis
oxidizing
absolute configuration
46. Name for propanal
mcpba
propionaldehyde
lindlar's catalyst
ozonolysis
47. Two p orbital form pi and third p orbital combine with s to make two sp hybrid. 180 degree apart
sp
not ignored
primary carbon
cold potassium permanganate
48. More likely it is to attract positively charged proton. nucleophilic strength decreses: RO->HO>RCO2>ROH>H2O
potassium permanganate
basicity
acetaldehyde
electrophile
49. Three different substitutents often have plane of symmetry. and rotation of 180 will allow molecule to be superimposed on mirror image
basicity
electrophile
absolute configuration
achiral
50. If reagent has a bunch of oxygen
anti conformation
stereoisomers
ketone
oxidation