$Ph-CH=CH-C(=O)CH_3 \to Ph-CH=CH-CO_2H$
The above conversion can be achieved by:

Consider the above reaction and predict the major product.

$A$ compound $A$ with molecular formula $C_{10}H_{13}Cl$ gives a white precipitate on adding silver nitrate solution. $A$ on reacting with alcoholic $KOH$ gives compound $B$ as the main product. $B$ on ozonolysis gives $C$ and $D$. $C$ gives Cannizzaro reaction but not aldol condensation. $D$ gives aldol condensation but not Cannizzaro reaction. $A$ is:

Carbonyl compounds undergo nucleophilic addition because of

Which of the following is used to detect aldehydes?

Product $(D)$ will be