How will you distinguish between HCHO and `CH_3CHO` ? Give chemical reactions.

How will you distinguish between ethanol and acetic acid ?

How will you distinguish between acetaldehyde and acetone ?

How will you distinguish between the following (give one chemical test): 3-Bromopropene and 1 -bromopropane.

How will you distinguish between the following (give one chemical test): Chlorobenzene and chlorocyclohexane.

How will you distinguish between the following (give one chemical test): Chlorobenzene and n-hexylchloride.

How will you distinguish between the following (give one chemical test): Chloroethane and bromoethane.

How will you distinguish between the following (give one chemical test): Chlorobenzene and benzyl chloride.

How will you distinguish between the following (give one chemical test): Ethyl chloride and vinyl chloride.