Test of 2,4-dinitrophenylhydrazine on aldehydes et ketones

Questions

Use the arrows above !

The formula of DNPH : The two H atoms in blue go with the O atom of the carbonyl group. The C atom of the carbonyl will be linked by a double bond to the N atom of the DNPH. Write the formula of the hydrazone (orange precipitate) formed with acetaldehyde.

With acetone (propanone)?