How will you distinguish:
Propanal and Propanone

Explanation

a) Tollen.s reagent test
Propanal gives silver mirror withTollen.s reagent.
`underset("Propanal")(CH_3CH_2 CHO) + underset("Tollen.s reagent") (2[Ag(NH_3)_2]OH) to CH_3 COONH_4 +underset("Silver mirror")(2Ag + H_2O) + 3NH_3`
Propanone does nor give this test.
b) Fehling solution test : Propanal gives red ppt. with Fehling solution.
`CH_3 CH_2 CHO + underset("Fehiling solution") (2Cu(OH)_2) + 2NaOH to CH_3 COONa + underset("Red ppt.") (Cu_2O) + 3H_2O`
Propanone does not give this test.
c) Iodoform test : Propanal does not give iodoform test whereas propanone gives iodoform test.
`underset("Propanone")(CH_3 - overset(O)overset(||)C ) - CH_3 + 4NaOH + 3I_2 to CH_3 COONa underset("Iodoform")(+ CHI_3) + 3NaI + 3H_2O` n