How will you distinguish between formaldehyde and acetaldehyde ?

How will you distinguish between acetaldehyde and acetone ?

How will you distinguish: Benzaldehyde and acetophenone

How will you distinguish between ethanol and acetic acid ?

Write a chemical test to distinguish between benzaldehyde and acetaldehyde.

How will you distinguish between : CH_(3)CHO (acetaldehyde or propanal) and CH_(3)COCH_(3) (acetone or propanaone).