General Chemistry
Which is the poorest measure of intermolecular strength?
Viscosity
Heat of vaporization
Vapor pressure
Heat of Fusion
Heat of fusion
Hexane is most soluble in what solution?
Ethanol
CCl4
H20
More than one answer
CCl4 because both are nonpolar.
An enzyme capable of unwinding DNA duplex.
Ligase
Helicase
Dehydrogenase
Endonuclease
Helicase
What fraction of 60 minutes is 12 seconds?
1/200
1/300
1/600
1/100
1/300
If you unfold the piece of paper where are the holes?
A
Which colligative property has the greatest change when a solute is added?
Freezing point depression
Osmotic pressure
Vapor pressure
All the same
Osmotic pressure
If someone wanted to release 18.2 ml of liquid into a beaker what would be used?
Buret
Pipet
Graduated cylinder
Pipet
What particle is the smallest?
Frog egg
Adenovirus
E coli
Erythrocyte
Adenovirus
A dentist charges 248$ but there is 12.5% tax. What is the total cost?
256
265
277
279
279
Rank the angles from smallest to largest.
B
Which of the following is polar?
CBr4
SO3
XeF4
ClF5
ClF5
Chlorine has 7 valence electrons and 5 are getting used. Lone pair causes polarity.
Which has the lowest boiling point?
Heptane
2,3-dimethylpentane
2,2,3-trimethylbutane
3-methyhexane
2,2,3-trimethylbutane because it has the most branching.
Penicillins inhibit what from bacteria?
Produce ATP
Form spores
Replicate nucleic acids
Synthesize cell walls
Synthesize cell walls
What is the length of a side of a square if the area and perimeter are equal?
1
2
4
1/2
4
How many cubes have 3 sides shown?
4
Which of these ions has the largest radius?
S-2
F-
Ne
Ca+2
S-2
In a polar protic solvent, ___ is the best nucleophile, but in an aprotic solvent ___ is the best nucleophile.
Use I- and F- to fill in the blanks.
I-, F-
What process is common between anaerobic and aerobic organisms?
Fermentation
Krebs cycle
Glycolysis
All
Glycolysis
Consider a complex polygon of 12 sides. What do the interior angles add up to.
1800
900
460
2000
1800
equation is 180(n-2)
180(12-2) = 1800
E
In H20, what is the weakest base?
NH3
OH-
ClO4-
NH2-
ClO4-
The strongest acid is the weakest base.
Which electrophilic substitution is reversible?
Oxidation
Sulfonation
Halogenation
Hydrogenation
Sulfonation
Which is true of an echinoderm?
Invertebrates
No segmentation
Adults have radial symmetry
All
All
7
13
17
19
13
D