Which of the following is the reactive intermediate formed in the electrophilic Friedel-Crafts acylation of toluene with CH3COCl and AlCl3?

Which one of the following pairs of compounds will yield the following product in the presence of sulfuric acid?

Predict the structure of the product for the following reaction.

The following reaction will occur via which mechanism?

Which one of the following compounds would be most reactive toward electrophilic aromatic substitution?

Which of the following will have the highest wave number for the carbonyl stretch in the IR spectrum?

Compound A on ozonolysis yields the following two products What is the structure of compound A?

Which one of the following compounds will be most reactive towards an electrophilic aromatic bromination reaction?

Which of the following substituents are deactivators in electrophilic aromatic substitution?

Which of the following compounds undergoes nitration most rapidly?