Which of the following is an acetal?

Rank the following compounds in order of increasing reactivity towards chlorination with Cl2/AlCl3 (slowest reacting to fastest).

In electrophilic aromatic substitution, a halogen substituent is

What kind of reactions do aldehydes and ketones undergo?

Predict the product, when pentanal reacts with CH3NH2 in the presence of an acid catalyst.

What is the product of the reaction sequence below?

Predict the product, when 4-methyl-2-hexanone reacts with methylamine in the presence of an acid catalyst.

Provide the reagents necessary to carry out the following conversion. 

Predict the product, when cyclopentanecarbaldehyde reacts with phenylhydrazine (PhNHNH2) in the presence of an acid catalyst.

Which of the following is the best choice to prepare the following alkene using the Wittig reaction?