Consider the given reaction:
${\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\text{ dil Ba(OH) }}{⟶}\text{ " }\mathrm{X}"$
The functional groups present in compound " X " are:

$\underset{\text{ (acetone) }}{{\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\text{ dilBa(OH}{)}_2}{⟶}}\text{ aldol }$ condensation

(1) Steps involved in the formation of compound is
(i) Oxidation by Tollen’s reagent
(ii) Reduction of >C=O by suitable reducing agent.
(2) Steps involved are
(i) Oxidation to carboxylic acid by Tollen’s reagent
(ii) Reduction of –COO– TO –CH2OH by suitable reducing agent.
(iii) Reduction of >C=O to alcohol by suitable reducing agent.
(3) It is formed by reduction of the given substrate, Tollen’s reagent does not act as reducing agent.