Write a test to differentiate between pentan-2-one and pentan-3-one.

Explanation

Iodoform test (yellow ppt. formed when heated with sodium hypohalite) Pentan-2-one gives positive test as it contains `-COCH_(3)` group whereas pentan-3-one does not.
`{:(underset("Pentan-2-one")(CH_(3)CH_(2)CH_(2)-overset(O)overset(||)C-CH_(3))overset(I_(2)//NaOH)underset("Iodoform test")rarrundersetunderset("ppt")("Yellow")(CHl_(3))+undersetunderset("butanoate")("Sodium")(CH_(3)CH_(2)CH_(2)COONa)),(underset("Pentan-3-one")(CH_(3)CH_(2)CH_(2))-overset(O)overset(||)C-CH_(3)overset(I_(2)//NaOH)rarr"No yellow ppt. of CHI"_(3)):}`