What is the IUPAC name of the following compound?

Which of the following has a higher acidic character than benzoic acid?

_____ ketones are generally named by adding the name of the acyl group as prefix to the word phenone.

Identify X in the following conversion.

Which of the following reactions does not give benzaldehyde?

p-Xylene on reaction with acidified potassium dichromate at high temperature gives ____

Identify the correct IUPAC name of CH3-CH=CH-CHO.

How many aldehydic groups does the compound phthaldehyde have?