Milk can be preserved by adding a few drops of

$H-CDO + H^{18}O^{-} \rightarrow D-C^{18}O^{-} + CH_2D-OH$. The above reaction is known as:

The reaction of cyclopentanone with $NaOBr$ gives which product?
$\text{Cyclopentanone} \xrightarrow{NaOBr} \text{Product}$

Acetaldehyde forms a white crystalline precipitate on mixing with a ...... solution of

Identify the reagent $R$ used in the following reaction:
$\text{Ketone} \xrightarrow{R} \text{Semicarbazone}$

The compound $A$,$C_{8}H_{8}O_{2}$,reacts with acetophenone to form a single product via cross-Aldol condensation. The compound $A$ on reaction with conc. $NaOH$ forms a substituted benzyl alcohol. Identify compound $A$.