‘X’ on reaction with Grignard’s reagent followed by hydrolysis gives CH32CHCH2CHO

If Z = – H, we get a aldehydeIf Z = – R, we get a ketoneIrrespective of the length and size of aldehyde to be prepared from RMgX, the other starting material is always HCNCH32CHCH2MgBr→H2OHCNCH32CHCH2CHO