Phenol is weakly acidic and can be deprotonated in basic solutions compared to cyclohexanol. The pK_a of phenol is 10, while the pK_a of cyclohexanol is 16. Explain why the pK_a of phenol is lower than the pK_a of cyclohexanol.

N,N,2,4,6-pentamethylaniline is a stronger base than N,N,4-trimethylaniline. Why?

What product will be formed in the reaction shown below?

Show how to accomplish the transformation shown below.

Provide the necessary reagents to carry out the given synthesis.

Propose a reaction scheme for synthesizing N-benzylpropan-2-amine from benzene, toluene, and alcohols using no more than four carbon atoms as starting materials.

The amino group in the compound below was protected using a carboxybenzyl (CBZ) group. Propose a mechanism showing the removal of the CBZ group in the following reaction:

Draw the minor product(s) of the reaction given below.

Show how the following syntheses can be accomplished.

Classify the below-given monosaccharides based on their functional groups and the number of carbon atoms (such as ketopentose and aldohexose).
a. D-fructose
b. D-galactose
c. L-xylose
d. L-ribose
e. L-threose
f. L-glucose
g. L-erythrose

Identify the given monosaccharide as D or L.

Draw the Fischer projections of the following aldohexoses.

i. L-Mannose

ii. L-Galactose