How many carbon atoms does formaldehyde have?

Benzoic ethanoic anhydride on hydrolysis gives ______

How many aldehydic groups does the compound phthaldehyde have?

Which of the following acids have a double bond in their structure?

Identify the catalyst in the nucleophilic addition of HCN to acetone.

Which of the following is an incorrect name for the following compound?

Which of the following carboxylic acids is most reactive towards esterification with given alcohol?

Identify the reagent(s) for the conversion of chlorobenzene to 3-chlorobenzaldehyde.