Which of the following organic compounds would have the strongest conjugate base? (hint: most reactive) a) CH3CH2OH  pKa  =  18     b) CH3CH3  pKa  =  50  c) C6H12  pKa  =  52   d) CH3CO2H  pKa  =  5 e) CF3CO2H  pKa  =  0

The bold-faced hydrogen in the following example is mildly acidic.  What type of orbital is responsible for containing the resulting negative charge of its conjugate base? a) 2s b) 2sp2 c) 2sp d)2 sp3 e) 2p

Which compound is a ketone?  

Which is NOT a correct Lewis structure?

Which compound is an aldehyde?   a ) I b  II c) III d) IV e) V  

The greatest degree of ionic character is anticipated for the bond between, Atom H C Cl Br Electronegativity 2.1 2.5 3.0 2.8 a) H and C. b) H and Cl. c) C and Cl. d) H and Br. e) Br and Cl.

Which of the following compounds would have the lowest boiling point?   a) I b) II c) III d) IV

How many pi bonds are there in the following substance? a) 2 b) 3 c) 4 d) 5

What is the conjugate base of ethanol (CH3CH2OH)? a) CH3CH3  b) CH3CH2- c) CH3CH2OH2+ d) CH3CH2O–  e) CH3OCH3

What is the formal charge on carbon in the following structure? a). +2 b). +1 c). 0 d). -1