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Terms in this set (75)
Which one of these structural features is not affected by hybridization?
Formal charge on bonded atom
How many secondary hydrogens does the following compound have?
What is the configuration of the asymmetric center in each of the following compounds?
R, S, R
Fats are solids at room temperature because:
All of the above are correct
Rank the following compounds from highest wavenumber to lowest wavenumber for their C=O absorption band:
II, III, I
Which basic molecular shape is possible from all types of hybridization?
What is the systematic or IUPAC name of the following compound?
What is the relationship between the compounds shown below?
Which type of chemical process cannot convert an oil into a fat?
A cis-to-trans isomerization
Rank the following compounds in order of increasing (from lowest to highest) maximum wavelength.
An atom in a Lewis structure has 2 sigma bonds, one double bond and one lone pair. What is its hybridization?
What is the strongest intermolecular force between molecules of ethanol?
dipole-dipole, specifically hydrogen bonding
Which are identical compounds?
Which one of these reactions associated with fats and oils will have a negative entropy change, ∆S?
(CH₃)₂C=C(CH₃)COOH + H₂ --> (CH₃)₂CH-CH(CH₃)COOH
Which of the following mass spectra indicate the presence of a halogen?
peaks 41, 55, 83, 162, 164
Which one of these electrons in a molecule would be easiest to lose by electron impact ionization?
A non-bonding electron
If a triglyceride is liquid at room temperature, which one of these statements about the glyceride would be correct according to the passage?
The configuration of all C-C double bonds on the fatty acid chain are known
Which of the following molecules will rotate the plane of polarization of plane-polarized light?
Which of the following correctly ranks the cycloalkanes in order of increasing ring strain?
Which structural factor is responsible for the difference in the acidity of the following acids:
Location of the substituent
Which one of these types of numbers is not a measure of the strength or weakness of an acid?
If the following are names of organic compounds, which one could be a saturated hydrocarbon?
(S)-Mandelic acid has a specific rotation of -158°. What would be the observed specific rotation of (R)-Mandelic acid?
Which one of these long chain carboxylic acids could be a naturally occurring fatty acid?
Which compound corresponds to the IR spectrum shown below?
In the mass spectrum of 2-methylpentane (shown below), a peak at m/z=43 is most probably due to which fragment?
Which one of these thermodynamic quantities can never be negative?
Which compound below has four different stereoisomers?
Which compound is a secondary amine?
Which of the following covalent bonds has the largest dipole moment?
Which of the following is the most likely Lewis structure for C₂H₂?
How many tertiary carbons are in the structure given below?
Which one of these is the most appropriate definition for enantiomers?
Non-superimposable molecules that are mirror images of each other.
Which one of these species involved in a chemical reaction is the least stable?
Which one of these quantitative determinations can not be based on UV-Vis spectroscopy?
Melting point temperature for DNA
For the section of a mass spectrum shown below, the m/z=41 and 43 amu do not represent isotopic peaks that differ by 2 amu because:
All of A, B, and C.
Free radicals are highly reactive species because they...
have an unpaired electron.
Which one of these centers can never be a chirality center as described?
An uncharged sp³-O with only two bonds
The chloride atoms of this isomer of 1,2-dichlorocyclohexane are in what orientations (the orientation on C1 is listed first)?
What are the formal charges on nitrogen and the indicated oxygen in the following Lewis structure?
What orbitals overlap to form the C-H bond in ethene (H₂C=CH₂).
Which one of these conformational structures does not possess a steric strain due to CH₃/H interaction?
Which one of these, when present, eliminates the possibility for stereoisomerism in molecules?
Plane of symmetry
How many monochlorinated products (neglicting stereoisomerism) are formed in the free radical chlorination of pentane?
Which one of these compounds will show only one C-O absorption in its IR spectrum?
Ultraviolet spectroscopy provides information about:
Conjugated double bonds
Which of the following is not an electrophile?
Which of the following is sec-butyl chloride?
Which two species act as base and conjugate base in the acid-base reaction shown below?
2 and 4
Which one of these is not correct about meso-compounds?
The stereoisomer must rotate plane polarized light.
Which of the following structures represents the correct condensed structure of lactic acid?
Which one of the following would not increase the octane rating of gasoline?
Which of the following best describes a racemate or racemic mixture?
50-50% mixture of enantiomers
Which of the following correctly describes the reaction whose reaction coordinate diagram is shown below?
Exergonic with a transition state
A bond that is "stiffer" is:
In the reaction below, what are the correct products of the reaction?
H₂C=CHCH₃ + H₃COH
Why is a positively charged oxygen atom less stable than a positively charged nitrogen atom?
Oxygen is more electronegative than nitrogen.
Increasing the percentage of heptane in a gasoline mixture will have what effect on the engine?
increase the knocking of the engine
Which of the following structures correspond to (S)-(+)-enantiomer?
The H₂CO₃/HCO₃⁻ buffer that controls the pH of blood is an example of ____ pair.
During a gym workout, our system produces large amounts of carbon dioxide which may eventually become toxic to the body. Which mechanism best illustrates the response to this increase in carbon dioxide by our body?
The equilibrium between carbonic acid and bicarbonate (Eq. 2) shifts to the left, which increases the concentration of H⁺
How are 2-methylbutane and 2,2-dimethylpropane related to one another?
They are constitutional isomers.
What is the benefit of prescribing a drug as a single enantiomer?
A single enantiomer spares the patient from having to metabolize the less potent enantiomer and decreases the chance of unwanted drug interactions.
Which of the following describes the reaction shown below?
Which of the following ketones is conjugated to a C=C bond?
Identify each step as initiation, propagation, or termination.
initiation=b; propagation=a,f; termination=c,d,e
Which would you expect to have the highest C=O wavelength?
Which alkane would you expect to have the lowest boiling point?
In 1992, the FDA recommended the use of modern synthesis and separation techniques to produce single enantiomer drugs. Which of the following is not a technique to separate enantiomers?
Which condition best describes acidosis?
A condition in which the system pH is less than 7.4
What are the hybridization (H) and formal charge (F) of the indicated oxygen atom in lactic acid?
Identify the aromatic compound which can be used as an additive in gasoline.
How many chirality centers are there in the structure of penicillamine shown below?
Which of the following is the most stable radical?
In the resonance structures of the amide, which is the more important resonance contributor?
The structure with the C=O
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