Which of the following ketones cannot be prepared using an acetoacetic ester synthesis?

Provide the reactants necessary to prepare the following compound using Robinson annulation.      

Identify the product obtained in the hydrolysis of the following cyclic acid anhydride.

Which of the following compounds is most basic?

Which one of the following esters cannot form an enolate ion?

Which of the following reactions would not yield isopropyl acetate as major product?

What is the structure for ethyl 4-chlorobenzoate?

Which of the following compounds is an enol of compound X drawn below?

Acetyl chloride undergoes nucleophilic acyl substitution faster than methyl acetate because

A compound with molecular formula C8H14O4 exhibits a triplet at δ 1.3 (I=6), a singlet at δ 2.6 (I=4) and a quartet at δ 4.2 (I=4) in its 1HNMR spectrum. Its IR spectrum shows a strong absorption band near 1740 cm-1. What is the structure for this compound?