How does the cocaine molecule interfere with neurotransmitter uptake?

A) It has the correct size and shape to wedge itself into the neurotransmitter uptake channel.
B) It has the correct polarity to wedge itself into the neurotransmitter uptake channel.
C) It has the correct size, shape, and polarity to wedge itself into the neurotransmitter uptake channel.
D) None of the above

What consumer products contain radioactive materials?

A) Smoke detectors
B) Static eliminators
C) Convection ovens
D) Both a and b above

The following [3+2] cycloaddition was reported in Organic Letters, 2011, 402. Predict whether the reaction would be thermally or photochemically promoted. Justify your answer by showing overlap of the correct molecular orbitals. Assume the alkene is the electrophile.

What is wrong with the following reaction?

What defines a catalyst?

A) A material that speeds up a reaction rate
B) A material that is used up in a reaction
C) A material that is not used up in a reaction
D) Both a and c are correct.

What happens to the pressure of a gas when the volume of the system is halved, assuming all other factors remain constant?

A) It too is halved.
B) It doubles.
C) There is no change.
D) The number of moles of the gas must decrease as well.

What is the mathematical formula to determine pH from the hydrogen ion concentration?

Where is terrestrial radiation found?

A) Cosmic winds interacting with the atmosphere
B) Naturally occurring elements in the earth's crust
C) Radioactive isotopes in meteorites
D) Ocean water

Which compound lacks a strong, characteristic IR absorption near 1700 cm^-1?

A) CH₃CH₂CO₂H
B) CH₃CH₂CHO
C) (CH₃CH₂) ₂C=O
D) (CH₃CH₂) ₂O
E) H₃CH₂CO₂CH₃

What class of organic compound is the major product of the acid catalyzed reaction of an alcohol with a carboxylic acid?

A) ether
B) ester
C) thiol
D) nitrile
E) sulfonate ester