I. These molecules are unstable.
The hydroxyl group is rapidly protonated and lost as water under acidic conditions,
leaving behind a reactive carbocation.
II.
III. The molecules are extremely basic and react rapidly with one another.
(A) I only
(B) I and II only
(C) II and III only
(D) I, II, and III9 . In a hemiacetal, the central carbon is bonded to:(A) –OH, –OR, –H and –R.
(B) –H, –OR, –OR, and –R.
(C) –OH, –OR, –R, and –R.
(D) –OR, –OR, –R, and –R.10 . In a reaction between hydrogen cyanide, butyraldehyde, and ethylmethylketone, which
compounds will come together to form the major product?(A) Butyraldehyde and hydrogen cyanide
(B) Ethylmethylketone and butyraldehyde
(C) Hydrogen cyanide and ethylmethylketone
(D) No reaction will occur.11 . Which of the following describe(s) pyridinium chlorochromate (PCC)?I. An oxidant that can form aldehydes from primary alcohols
II. An oxidant that can completely oxidize primary alcohols
III. An oxidant that can completely oxidize secondary alcohols